DAVID J. HAGAN

Curriculum Vitae May 2020

DAVID J. HAGAN

Pegasus Professor of Optics and Photonics Interim Dean

CREOL, The College of Optics and Photonics University of Central Florida

[email protected] Personal Data, Education, Employment history, Scholarly activities Education Ph.D.: Physics, Heriot-Watt University, Edinburgh, 1985. Thesis Title: "Carrier Diffusion Effects in Semiconductors and Nonlinear Optical Devices."

B.Sc.: First Class Honors in Physics, Heriot-Watt University, Edinburgh, Scotland, 1982. Dissertation title: "A Variable Multilayer Attenuator for High Power CO2 Lasers."

Employment History: 2019 – current Interim Dean, CREOL, The College of Optics & Photonics 2009 Visiting Professor, Heriot-Watt University, Edinburgh. 2004 - 2019 Associate Dean, Academic Programs, CREOL, The College of Optics & Photonics 2003- Current Professor of Optics & Photonics, CREOL, The College of Optics & Photonics, 2001 - 2004: Associate Director for Academic Programs, School of Optics 1998- 2004: Associate Professor of Optics and Physics, School of Optics 1999 Visiting Research Professor, CPMOH, University of Bordeaux I, Bordeaux, France 1993-1998: Associate Professor, Physics and Electrical Engr., CREOL, Univ, Central Florida. 1992-1993: Associate Professor of Physics, CREOL, University of Central Florida. 1987-1992: Assistant Professor of Physics, CREOL, University of Central Florida. 1985-1987: Research Scientist, Center for Appl. Quantum Electronics, North Texas State Univ. 1982-1985: Teaching Assistant, Department of Physics, Heriot-Watt University. 1984 (Sept-Dec) Scientist, Laser Gyroscope Group, Ferranti plc, Edinburgh, UK. 1984-1985 Warden, Student Halls of Residence, Heriot-Watt University. 1982 (June-Oct) Scientist, Laser Gyroscope Group, Ferranti plc, Edinburgh, UK. 1980-81 President, Heriot-Watt University Students' Association. (salaried)

Scholarly and External Service Activity: 2019-2020 Chair of Publications Council and Member of Board of Directors, OSA 2019 General Chair, OSA Topical Meeting on Nonlinear Optics, 2019 2017 Program Chair, OSA Topical Meeting on Nonlinear Optics, 2017 2016 – 2019 Executive Editor-in-Chief, Chinese optics letters 2016 – 2019 Member, SPIE Education and Outreach Committee 2016 – current member, SPIE Accreditation subcommittee 2016 – current ABET Program Evaluator 2016 Program Committee, Advanced Solid State Lasers meeting, Boston, MA. 2015 General Chair, OSA, Frontiers in Optics meeting, San Jose, CA 2013 Program Chair. OSA Frontiers in Optics Meeting, Orlando, FL 2012-Current Advisory Board, Rose-Hulman Institute of Technology, Optical Engineering program. 2010-2015 Founding Editor-in-Chief, Optical Materials Express 2007-2010 Topical Editor for J. Opt. Soc. Am B 2004-2008 Member OSA Science and Engineering Council. (Vice-Chair, Nonlinear Optics) 2004-2007 Member, President’s Science Advisory Council, Orlando Science Center 2003-2007 Chair, Optical Society of America Special Publishing Activities Committee 2001- 2007 Member, Optical Society of America Publications Council 2001- 2003 Chair, Optical Society of America Books Publishing Committee 2001- 2006 Principal Editor, Journal of Materials Research 2001 Sole Consultant on Optics/Photonics for National Research Council's "Defense After

Next" - panel on defense research for the next 25 years. 1997, 2000, 2008-2010 Program Committee, QELS 1997, 2000 1996 -2002 Program committee, Conf. on Nonlinear Optical Liquids & Limiting, SPIE, San Diego. 1998-2002 Member, Optical Society of America Books Publishing Committee 1997, 98, 99, 02 Program Committee LEOS Annual Meeting 1997 Technical Committee, Materials Research Society Spring Meeting, Symposium on

Optical Limiting, San Francisco. 1996, 99 Co-Chair, Conference on Nonlinear Optical Liquids, SPIE Optics & Photonics, (1996

and 1999). 1995-2000 Co-Organizer, CREOL NSF Graduate Traineeship Program 1995-96 Chair, Physics Ph.D. Qualifying Examination Committee. 1991-2002 Director and PI, NSF/CREOL Research Experience for Undergraduates Program. 1992-Current Proposal Reviewer for NSF, ARO, AFOSR, etc. 1991 Judge, International Science and Engineering Fair, Orlando, FL. 1990 Chair & Organizer, FHTIC/CREOL Workshop on "High Temperature Superconductor

Detectors, an Industry - Academia Exchange", Orlando, FL. 1989 Instructor, NSF/Laser Institute of America Optics Workshop for Undergraduate College

Teachers. 1989-90 Secretary, Local Arrangements Committee, OSA/IEEE-LEOS 1989 Natl. Conf. 1988-91 Secretary, Vice President and President, Optical Society of America, Florida Chapter. 1985-Current Regular reviewer for many international journals 1981-82 Editor, Heriot-Watt University Student Newspaper.

1980-81 President, Heriot-Watt University Students Association. 1978-79 President, National Student Television Association (UK). University Service Since 2004 served on many UCF and College committees ex-officio as Assoc. Dean. 2016 Member, Provost’s advisory committee on Research and Graduate Education 2016 Member, Chemistry department Chair Search committee 2006-2009 Member of Nanoscience’s P&T committee 2003 – 2010 Member, UCF strategic planning group in Graduate Education 2002 Member, UCF task force on Graduate Tuition funding 2001- 2015 Chair, School of Optics Student Recruiting Committee 2001- current Chair, School of Optics Curriculum Committee 2001- current Associate Director For Academic Programs, School of Optics/CREOL 2001 Chair, Optics PhD Qualifying exam Committee 2001-2002 Chair, UCF Graduate Council 1999 – 2003 Member School of Optics Promotion and Tenure committee (Chair 2002-03) 1999- Current Member, Optics PhD Candidacy/Qualifying exam Committee 1995-97, 00-02 UCF Senate Member 1995-97 UCF Undergraduate Policy and Curriculum Committee. 1995-96 Chair, Physics Ph.D. Qualifying Examination Committee. 1993-96 Member, Physics Ph.D. Qualifying Examination Committee. 1992-95 Co-Chair, CREOL Academic Affairs Committee 1989 Member of UCF International Student Health Insurance Task Force. 1987-93 Member of the Physics Department Graduate Committee. 1987-89 Co-Chair, CREOL Graduate Affairs Committee. Consultancy: Laser Applications, Inc., Orlando, FL. (1988-1990); Decade Optical Systems Albuquerque, NM, (1994 - 1995); Polara, LLC, Oviedo, FL, (1998-2002); Genesis Systems, Oviedo, FL, (2004) Professional Organization Memberships: Fellow, Optical Society of America (OSA) Fellow, SPIE – The International Optical Engineering Society Senior Member, IEEE Lasers and Electro Optics Society (LEOS) Materials Research Society. (MRS) Secretary & President of OSA Florida Chapter, 1988-90 Founder Member of LEOS Orlando Chapter and the Optical Society of North Texas Professional awards:

Elected to Fellow of SPIE (2016) Elected to Fellow of OSA (2007) Ranked by ISI as a “Highly Cited researcher” (2001)

R&D 100 Award 2001: "Tandem-Configured Solid-State Optical Limiter" - Collaboration with GelTech, Los Alamos and Army Research Office 2001 UCF Research Incentive Award (RIA) 2004, 2012 (For sustained excellence in research) UCF Teaching Incentive Program (TIP) Awards: 1995, 2001. (For sustained excellence in teaching.) NCAA/NCAS Student-Athlete Teacher Award, 1996. (Best teacher, as voted by student athletes.) “Distinguished service Award”, - Lake Highland Preparatory School, 2000, (In appreciation of supervision of student and teacher research.)

Teaching Experience: (a) Regularly Scheduled Courses Taught at UCF:

OSE 3052 Introduction to Photonics (Sp 2013, 2014, 2015, Fall, 2013 OSE 4951 – Senior design 1 (Su, F, Sp, 2016 - 2020) OSE 4952L – Senior design 2 (u, F, Sp, 2016 - 2020) EEL6561 Fourier Optics (Su '87; Su '88; Fall '89 Spr 2009) PHY5446 Laser Principles (Spring '88; Spring '89; Spring '93) EEL6560 Laser Engineering (Spring '88; Spring '89) PHY4424 Optics (Fall '90, Fall '99) PHY 4424L Optics Laboratory (Spring 2000) PHY6434 Nonlinear Optics (Spr '91, Spr '92, Fall '93, Fall '97, Fall '98) PHY6448 Specific Laser Systems (Summer '91) PHY3049 Physics for Sci & Eng II (Fall '92, Spr '97, Spr '99) EEL5441L Electro-Optics Lab (Spr '94) PSC 1121 Physical Science (Fall '94, Spr '95, Spr '96) PHY3053 Therm & Stat Phys (Fall '95, Fall '96) EEL 4440 Optical Engineering (Spring 2001) OSE 5312 Optical Properties of Materials (Fall 2000, Summer 2001) OSE 5312 Fundamentals of Optical Science (Fall 00, 02, 03, Spr 05, 06, 07, 08)

(b) Teaching Laboratory Development:

PHY 3049L Physics for Scientists and Engineers Laboratory: 1994 Re-wrote and upgraded the laboratory manual for this lab. 1995-96, Worked with Dr. Bass on the development of Computer Aided Learning (SAIL) in the PHY 3049 laboratory. Teaching of students by this method was implemented on a trial basis in Spr 1996. Two proposals were submitted, to NSF and Florida Dept. of Ed., to gain developmental funding for this endeavor. PHY 4424L Optics Laboratory Developed & taught lab in 2000.

(c) NSF Summer Undergraduate Research Program:

As Principal Investigator on the NSF funded Research Experiences for Undergraduates Program for 1991-2002, and co-investigator from 2002-2011, Conducted many hours of formal and informal lectures and supervised one or two undergraduate research students each summer.

(d) Graduate Theses and Dissertations:

1. Masters J. Malhotra, (EE) "Optically Induced Darkening in Semiconductor-Doped Glass" (Completed 1989)

Marcus Seidel (Optics) “Characterization of the nonlinear refractive index of carbon disulfide over an extended spectral and temporal range" (2011)

Brendan Turnbull (Optics) "Non-degenerate Two Photon Gain in Bulk GaAs" (2013)

Matthias Muennich (Optics) "Beam Deflection" (2013) Evelyn Strunk (Optics) “Measurements Of Nonlinear Optical Properties Of

Organic Solvents Using Beam Deflection Technique” (2015) 2. PhD

i. J Wang “The dispersion and symmetry of Optical Nonlinearities in Semiconductors)(Electrical Engineering. Completed Feb, 1993)

ii. J. R. DeSalvo, "Dispersion of Bound Electronic Nonlinearities in Solids" (Physics. Completed August 1993)

iii. T. Xia, “Modeling and Experimental Studies of Nonlinear Optical Self Action” (Physics, Completed: June, 1994)

iv. P. Buck, "Ultrafast Broadband Studies of Nonlinear Optical Materials" (Electrical Engineering, Completed November, 1996)

v. Z. Wang, “All optical transistor using cascaded second order nonlinearities” (Electrical Engineering. Completed September, 1996)

vi. A. Dogariu “Spectral and Temporal Response of Optical Nonlinearities” (Physics Completed 1997)

vii. J. Lim “Nonlinearities of Polymethine and Squarylium Molecules for Optical Limiting” (Physics Completed 1998)

viii. D. Kovsh “Laser Beam Propagation through bulk nonlinear media: Numerical simulation and experiment” (Optics, Completed 1999)

ix. S.S. Yang “Optimization of Passive Optical Limiters” (Electrical Engineering, Completed 2000)

x. R. Negres “Ultrafast nonlinear spectrometer for material characterization” (Physics, Completed 2001)

xi. V. Dubikovskiy “Optical Limiting: Numerical Modeling and Experiment” (Physics, Completed 2003)

xii. R. Lepkowicz “Study of the Excited-State Absorption Properties of Polymethine Molecules” (Optics, Completed 2004)

xiii. J. Hales “Chemical structure - nonlinear optical property relationships for a series of two-photon absorbing fluorene molecules” (Optics, Completed 2004)

xiv. M. Balu "Experimental Techniques for Nonlinear Material Characterization: A Nonlinear Spectrometer Using a White-Light Continuum Z-scan" (Optics, completed 2006)

xv. Claudiu Cirloganu “Experimental and theoretical approaches to characterization of electronic nonlinearities in direct-gap semiconductors” (Optics, completed 2009)

xvi. Peter Olszak Nonlinear absorption and free-carrier recombincation in direct-gap semiconductors” (Optics, completed 2009)

xvii. Gero Nootz Experimental and Theoretical Study of the Optical Properties of Semiconductor Quantum Dots (Physics, completed 2009)

xviii. Davorin Peceli "Absorptive and Refractive Optical Nonlinearities in Organic Molecules and Semiconductors" (Optics and Photonics, completed 2012)

xix. Honghua Hu “Third Order Nonlinearity Of Organic Molecules” (Optics and Photonics, completed 2013)

xx. Manuel Ferdinandus "Techniques for Characterization of Third Order Optical Nonlinearities" (Optics and Photonics, completed 2013)

xxi. Himansu Pattanaik "Two-photon absorption in bulk semiconductors and quantum well structures and its applications" (Optics, completed 2015)

xxii. Trenton Ensley "White light continuum for broadband nonlinear spectroscopy" (Optics and Photonics, completed 2015)

xxiii. Matthew Reichert “Nonlinear optical response of simple molecules and two-photon semiconductor lasers" (Optics and Photonics, completed 2015)

xxiv. Peng Zhao “Ultrafast mechanisms of nonlinear refraction and two-photon photochromism” (Optics and Photonics, completed 2016)

xxv. Salimeh Tofighi “Transient Mid-IR Nonlinear Refraction in Air and Nonlinear Optical Properties of Organometallic Complexes” (Optics and Photonics, Completed April 2020)

xxvi. Sepehr Benis “nonlinear optical mechanisms in semiconductors and enhanced nonlinearities at epsilon-near-zero” (Optics and Photonics, Completed July 2020)

(e) Current PhD students:

Nicholas Cox

Hao-Jung Chang

Sanaz Faydras

Natalia Munera Ortiz (Visiting PhD student.)

(f) Postdoctoral Researchers Supervised

Mahesh Junnarkar (1987- 1991) Mansoor Sheik-Bahae (1987 – 1994) Martine Sence (1988 – 1991)

James Young (1988 - 1990) Ali Said (1991 – 1995) Saleh Kodjha (1995 - 1996)

Florencio Hernandez (1998 – 2003) Svitlana Berezhna (2001 – 2003) Armen Sevian (2003-2004) Peter Fredriksen (2004 - 2005) Scott Webster (2005 – current) Lazaro Padilha (2006 – 2009) Dmitry Fishman (2009 – 2013)

Honghua Hu (2012-2013) Akbar Ali Syed (2013-2015) Himansu Pattanaik (2014- 2016) Rajesh Sharma (2015-2016) Peng Zhao, (2017-2018 ) Natalia Munera Ortiz (2018-current)

Publications and Papers Researcher ID: H-2204-2011 ORCID ID: orcid.org/0000-0003-2713-1767

Summary: 167 Refereed journal publications. (Including 14 invited.) >450 Conference papers (118 invited/keynote/plenary, 235 refereed, >100 unrefereed) 75 Published proceedings resulted from the above conference papers.

Citations: Journal publications have been cited 14,821 times (excluding self-citations) – an average of 90 cites per paper.

As of May 2020, , h-index of 54 (ISI), 66 (Google Scholar). I-10 Index: 152.

A. Book Chapters, Books Edited 1. “Materials for Optical Limiting II”, P. Hood, R Pachter, K. Lewis, J.W. Perry, D.J. Hagan, R.

Sutherland, Ed.s, MRS, Symposium Proceedings, vol 479, (1997) (ISBN:1-55899-383-5)

2. “Optical Limiting” David J. Hagan, Chapter 13, Handbook of Optics (Volume IV), Edited by M. Bass, G. Li andE. Van Stryland, (McGraw-Hill, 2010), ISBN: 0071498923 / 9780071498920

3. "Nonlinear Absorption", E. W. Van Stryland and D. J. Hagan, chapter in "Encyclopedia Optical Engineering", Marcel Dekker, 2003.

4. "Two-photon absorption in near-IR conjugated molecules: design strategy and structure-property relations", Olga V. Przhonska, Scott Webster, Lazaro A. Padilha, Honghua Hu, Alexey D. Kachkovski, David J. Hagan, and Eric W. Van Stryland, in "Advanced Fluorescence Reporters in Chemistry and Biology, I. Fundamentals and Molecular Design", Springer Series on Fluorescence, 2010,. Series Editor: Otto S. Wolfbeis, volume Editor A. Demchenko, Volume 8, 2010. (2010)

5. “Novel optical materials in the 21st century.” David J. Hagan and Steven C. Moss. OSA Century of Optics (OSA, 2015) ISBN: 978-1-943580-04-0 pp 315-320

6. "Characterization of 2PA chromophores", E.W. Van Stryland, and D.J. Hagan, in Multiphoton lithography, edited by Jurgen Stampfl, Robert Liska, and Aleksandr Ovsianikov, Wiley-VCH, (2016).

7. "Nonlinear Absorption", E.W. Van Stryland, and D.J. Hagan, Encyclopedia of Optical Engineering, CRC Press, Taylor Francis, (2016).

Articles in Trade Journals 1. "High performance optical limiter", F. E. Hernández, S. Yang, V. Dubikovskiy, W. Shensky III, E.

W. Van Stryland and D. J. Hagan, LEOS Newsletter "Hot Topics", vol 14, number 6. (Dec 2000) pages 5 -7

2. "Nanosecond optical limiter exceeds dynamic range of 7500", Laser Focus World, Newsbreak, July 2000.

3. "India ink/carbon disulfide creates laser safety device" Florencio E. Hernández, William Shensky III, Ion Cohanoschi, David J. Hagan, and Eric W. Van Stryland Laser Focus World, November 2000.

4. "Two-photon spectroscopy " Eric Van Stryland, Raluca Negres, Joel Hales, and David Hagan Laser Focus World, August, 2001.

5. Invited: E. Van Stryland, D. Hagan, and S. Marder, "The dream of a turnkey nonlinear spectrophotometer gets closer to reality," Laser Focus World, vol. 44, pp. 77, Sept. 2008.

B. Patents and Patent Disclosures: Patents:

1. All-wave Polarization rotator: US patent. 6,476,966 (2002)

2. Extremely Non-Degenerate Two Photon Absorption Optical Sensing Methods, Apparatus and Applications, US Patent, US 8,778,703 B2 (2014)

Disclosures: 1. “Phase-Insensitive, Single Wavelength, All-Optical Transistor Based on Second-Order Optical

Nonlinearities”, Zuo Wang, D.J. Hagan, E. Van Stryland and G. Assanto. Patent Disclosure to UCF (April 1996)

2. “Ultrahigh Frequency Mechanical Optical Chopper” E. Van Stryland , A. Dogariu and D.J Hagan, Patent Disclosure to UCF (January, 1997)

3. "Continuously Variable, Wavelength-Independent Polarization Rotator.", F. E. Hernández and D. J. Hagan, Patent Disclosure to UCF, US Patent number 6,476,966, awarded 2002. (Resulted in formation of a company, Polara, LLC, in which UCF is a partner.)

4. “Infrared detection using nondegenerate two photon absorption” David J. Hagan and Eric W. Van Stryland, US Patent Application (December 2011)

C. Refereed Journal Publications: 1 "Phase Conjugation by Degenerate Four-wave Mixing in InSb with a cw CO Laser", H.A.

MacKenzie, D.J. Hagan and H.A. Al-Attar, Opt. Commun. 51, 352 (1984). 2 "Carrier Diffusion Measurement in InSb by the Angular Dependence of DFWM", D.J.Hagan,

H.A.MacKenzie, H.A. Al-Attar, and W.J. Firth, Opt. Lett. 10, 1987 (1985). 3 "The Spot Size Dependence of Switching Power for an Optically Bistable InSb Element", D.J. Hagan,

H.A. MacKenzie, J.E.E. Reid, A.C. Walker, and F.A.P. Tooley, Appl. Phys. Lett. 62, 203 (1985). 4 "Four-wave Mixing in Indium Antimonide", H.A. MacKenzie, D.J. Hagan, and H.A. Al-Attar, IEEE

J. Quantum Electron. QE-22, 633, (1986). 5 "Measurement of Transverse Coupling Between Parallel InSb Transphasors", D.J. Hagan, J. Young

and H.A. MacKenzie, Opt. Lett. 12, 696, (1987). 6 "Studies of Cross-Talk Between Bistable Elements on an InSb Etalon", J. Young, H. Richardson,

H.A. MacKenzie, E. Abraham and D.J. Hagan, J. Opt. Soc. Am., B5, 3 (1988). 7 "Self-Protecting Semiconductor Optical Limiters", D.J. Hagan, E.W. Van Stryland, M.J. Soileau,

Y.Y. Wu and S. Guha, Opt. Lett. 13, 315 (1988). 8 "Optical Limiting with Semiconductors", E.W. Van Stryland, Y.Y. Wu, D.J. Hagan, M.J. Soileau,

and Kamjou Mansour, J. Opt. Soc. Am. B5, 1980 (1988). 9 "Dispersion of Bound Electronic Nonlinear Refraction in Solids". M. Sheik-Bahae, D.J. Hagan, and

E.W. Van Stryland, Phys. Rev. Lett., 65, 96-99 (1990) 10 "Sensitive Measurement of Optical Nonlinearities Using a Single Beam", M. Sheik-Bahae, A.A.

Said, T.H. Wei, D.J. Hagan, and E.W. Van Stryland, IEEE J. Quantum Electron. QE-26, 760 (1990).

11 (INVITED): "Nonlinear Optical Characterization of Organic Materials", M.J. Soileau, T.H. Wei, M. Sheik-Bahae, D.J. Hagan, M. Sence and E.W. Van Stryland, Mol. Cryst. Liq. Cryst. 207, 97 (1991)

12 (INVITED): "Measurements of Third Order Nonlinearities of Nematic Liquid Crystals", P. Palffy-Mulhoray, H.J. Yuan, L. Li, M.A. Lee, J.R. DeSalvo, T.H. Wei, M. Sheik-Bahae, D.J. Hagan and E.W. Van Stryland, Mol. Cryst. Liq. Cryst., 207, 291 (1991).

13 "Dispersion of Bound Electronic Nonlinear Refraction in Solids", M. Sheik-Bahae, D.C. Hutchings, D.J. Hagan and E.W. Van Stryland, IEEE J. Quantum Electron. QE-27, 1296-1309 (1991).

14 "Studies of Laser Induced Darkening in Semiconductor Doped Glasses", J. Malhotra D.J. Hagan and B.G. Potter, J. Opt. Soc. Am. B8, 1531 (1991).

15 "Nonlinear Refraction and Optical Limiting in 'Thick' Media", M. Sheik-Bahae, A.A. Said, D.J. Hagan, M.J. Soileau and E.W. Van Stryland, Opt. Eng. 30, 1228 (1991).

16 "Direct Measurements of Nonlinear Absorption and Refraction in Solutions of Phthalocyanines", T.H. Wei, D.J. Hagan, M.J. Sence, E.W. Van Stryland, J.W. Perry and D.R. Coulter, Appl. Phys. B 54, 46 (1991).

17 "Degenerate Four-Wave Mixing Measurements of High Order Nonlinearities in Semiconductors", E.J. Canto-Said, D.J. Hagan, J. Young and E.W. Van Stryland, IEEE J. Quantum Electron. QE-27, 2274 (1991).

18 (INVITED): "Kramers-Kronig Relations in Nonlinear Optics", D.C. Hutchings, M. Sheik-Bahae, D.J.Hagan and E.W. Van Stryland. Opt. Quantum Electron., 24, 1 (1992).

19 "Determination of Bound and Free-Carrier Nonlinearities in ZnSe, GaAs, CdTe and ZnTe", A.A. Said, M. Sheik-Bahae, D.J. Hagan, T.H. Wei, J. Wang, J. Young and E.W. Van Stryland, J. Opt. Soc. Am. B 9, 409 (1991).

20 "Universal Dispersion and Band-Gap Scaling of n2 in Solids", M. Sheik-Bahae, D.C. Hutchings, D.J. Hagan and E.W. Van Stryland, Optics and Photonics News, 2, 22 (December, 1991).

21 "Self-Focusing and Defocusing by Cascaded Second Order Nonlinearity in KTP", R. DeSalvo, D.J. Hagan, M. Sheik-Bahae, G.I. Stegeman, H. Vanherzeele and E.W. Van Stryland, Opt. Lett. 17, 28 (1992).

22 "Measurement of Nondegenerate Nonlinearities Using a 2-Color Z-Scan", M. Sheik-Bahae, J. Wang, J.R. DeSalvo, D.J. Hagan and E.W. Van Stryland, Opt. Lett. 29, 258 (1991)

23 "Nondegenerate Two-Photon Absorption Spectra of ZnSe, ZnS and ZnO", J. Bolger, A.K. Kar B.S. Wherrett, R. DeSalvo, D.C. Hutchings and D.J. Hagan, Optics Commun., 97, 203 (1993).

24 "Z-Scan Measurements of the Anisotropy of Nonlinear Refraction and Absorption in Crystals", R. DeSalvo, M. Sheik-Bahae, A.A. Said, D.J. Hagan, And E.W. Van Stryland, Opt. Lett., 18, 203 (1993)

25 "Nonlinear Phase Shifts Using Second Order Nonlinearities", M. Sheik-Bahae, R. DeSalvo, D.J. Hagan, G. Assanto, G.I. Stegeman and E.W. Van Stryland, "Optics in 1992", Optics & Photonics News, 3 (12), p11 (1992).

26 (INVITED)"High Dynamic Range Passive Optical Limiters" D.J. Hagan, T. Xia, A.A. Said and E.W. Van Stryland, Int. J. Nonlinear Optical Phys., 2, 483 (1993)

27 "Eclipsing Z-Scan Measurement of lambda/104 Wavefront Distortion", T. Xia, D.J. Hagan, M.Sheik-Bahae and E.W. Van Stryland, Opt. Lett. 19, 317 (1994)

28 (INVITED)“Z-scan and EZ-scan measurements of optical nonlinearities, T. Xia, M. Sheik-Bahae, A.A. Said, D.J. Hagan and E.W. Van Stryland, Int. J. Nonlin. Opt. Phys., 4, 489-500 (1994).

29 “Phase Controlled Transistor Action by Cascading of Second-Order Nonlinearities in KTP”, D.J. Hagan, M. Sheik-Bahae, Z. Wang, G. Stegeman and E.W. Van Stryland, Opt. Lett. 19, 1305-1307 (1994).

30 “Time-Resolved Z-Scan Measurements of Optical Nonlinearities”, J. Wang, M. Sheik-Bahae, A.A. Said, D.J. Hagan, and E.W. Van Stryland, JOSA B11, 1009-1017 (1994).

31 “Third and Fifth Order Optical Nonlinearities in Organic Materials”, A.A. Said, C. Wamsley, D.J. Hagan, E.W. Van Stryland, B.A. Reinhardt, P. Roderer, and A.G. Dillard, Chem. Phys. Lett., 228, 646-650 (1994).

32 (INVITED & Refereed)“Optimization of Reverse Saturable Absorber Limiters: Material Requirements and Design Consideration” D.J. Hagan, T. Xia, A. Dogariu, A.A. Said and E.W. Van Stryland, Proceedings of MRS, Vol. 374, (1995), pp 161-172.

33 “Observation of Two-Dimensional Spatial Solitary Waves in a Quadratic Medium”, W.E. Torruellas, Z. Wang, D.J. Hagan, E.W. Van Stryland, G.I. Stegeman, L. Torner and C. Menyuk, Phys. Rev. Lett., 74, 5036 (1995).

34 “Polarization Dependent Four-Wave Mixing and Two-Photon Coherence in Solids”, M. Sheik-Bahae, J. Wang, E.J. Canto-Said, R. DeSalvo, D.J. Hagan, and E.W. Van Stryland, IEEE J. Quantum. Electron., QE-31, 1270-1273 (July, 1995).

35 “Measurement of Optical Breakdown Threshold in Fused Quartz”, A.A. Said, T. Xia, A. Dogariu, D.J. Hagan, M.J. Soileau and E.W. Van Stryland, Applied Optics, 34, 3374 (1995).

36 “All-optical Modulation via nonlinear cascading in type II second-harmonic generation” G. Assanto, Z. Wang, D.J. Hagan and E. W. Van Stryland, Appl. Phys. Lett., 67, 2120 (1995)

37 "Second Harmonic Generation: Toward and All-Optical Transistor", Z. Wang, D.J. Hagan, E.W. Van Stryland, G. Assanto, Optics and Photonics, “Optics in 1995” News, 6, 13-14 (1995).

38 "Observation of Two Dimensional Spatial Solitary Waves in a Quadratic Medium", W. Torruellas, L. Torner, Z. Wang, D.J. Hagan, E.W. Van Stryland, G. Stegeman, Optics and Photonics News, “Optics in 1995” 6, 23-24 (1995).

39 "Infrared to Ultraviolet Measurements of 2-Photon Absorption and n‚ in Wide Bandgap Solids", J. R. DeSalvo, A.A. Said, D.J. Hagan, and E. Van Stryland, IEEE J. Quantum. Electron., QE-32, 1324 (1996).

40 "Optimization of Optical Limiting Devices Based on Excited-State Absorption", T. Xia, D.J. Hagan, A. Dogariu, A.A. Said and E.W. Van Stryland, Applied Optics, 36, 4110-4122 (1997).

41 "Nonlinear Absorption and Refraction in CuCl at 532nm", A.A. Said, T. Xia, D.J. Hagan and E.W. Van Stryland, submitted to J. Opt. Soc. Am. B (March, 1996).

42 "Cascaded Second Order Effects in NPP, A Molecular Single Crystal", Zuo Wang, David J. Hagan, Eric W. Van Stryland, Joseph Zyss, Petar Vidakovik, and William E. Torruellas, J. Opt. Soc. Am. B 14, 76-86 (1997).

43 "Phase-Insensitive, Single Wavelength,All-Optical Transistor Based on Second-Order Nonlinearities", Z. Wang, D.J. Hagan, E.W. Van Stryland, and G. Assanto, Electronics Letters, 32, 1135 (1996).

44 "Purely Refractive Transient Energy Transfer Via Stimulated Rayleigh Wing Scattering", A. Dogariu, T. Xia, D.J. Hagan, A.A. Said, E.W. Van Stryland, and N. Bloembergen, J. Opt. Soc. Am. B 14, 796 (1997).

45 “χ(2) cascading phenomena and their application to all-optical signal processing, mode-locking,pulse compression and solitons,” (Invited) G. Stegeman, D. J. Hagan, and L. Torner, Opt. Quantum Electron., 28, 1691-1740 (December, 1996).

46 "Cascading: A Promising Approach to Nonlinear Optical Phenomena Revisited", R. Schiek, W. Torruellas, L. Torner, T. Baek, D. Baboiu, E. Van Stryland, D.J. Hagan, G. Assanto and G. Stegeman, in Novel Optical Materials and Applications, I.C. Khoo, F. Simoni and C. Umeton ed., John Wiley & Sons, (New York, 1997).

47 “Nonlinear absorption of soluble octasubstituted Metallophthalocyanines at 1.064 mm,”M. A. Díaz-García, A. Dogariu and D. J. Hagan, Chem. Phys. Lett. 266, 86-90 (1997)

48 “Low frequency Raman gain measurements using chirped pulses”, Arthur Dogariu and David J. Hagan, Optics Express, 1, 73 (1997)

49 O.V. Przhonska, J.H. Lim, D.J. Hagan, E. W. Van Stryland, M.V. Bondar, Yu.L. Slominsky, “Nonlinear light absorption of polymethine dyes in liquid and solid media,” J.Opt.Soc.Am. B, 15, 802 (1998)

50 “Nonlinear Optical Properties of Inorganic Metallic Clusters”, T. Xia, A. Dogariu, K. Mansour, D.J. Hagan, A.A. Said, E.W. Van Stryland and S. Shi, JOSA B, 15, 1497 (1998).

51 “Phase insensitive all-optical transistors based on second-order nonlinearities”, S. Kim, Z. Wang, D.J. Hagan, E.W. Van Stryland A. Kobayakov, F.Lederer and G. Assanto, IEEE J. Quantum Electron. 34, 666 (1998).

52 “Numerical modeling of thermal refraction in liquids in the transient regime.” Dmitriy I. Kovsh, David J. Hagan, Eric W. Van Stryland, Optics Express, 4, 315 (1999)

53 “Nonlinear Optical Beam Propagation for Optical Limiting” Dmitriy I. Kovsh, Sidney Yang, David J. Hagan, and Eric W. Van Stryland, Applied Optics, 38, 5168 – 5180 (1999)

54 (INVITED) “Polymethine and squarylium molecules with large excited-state absorption” Jin Hong Lim, Olga V. Przhonska*, Salah Khodja, Sidney Yang, T.S.Ross, David J. Hagan, Eric W. Van Stryland, Mikhail V. Bondar and Yuriy L. Slominsky. Chem. Phys., 245, 79-97 (1999).

55 “Near-IR Two-photon initiated polymerization using a fluorone/amine initiating system”, Kevin D. Belfield, Xiaobin Ren, Eric. W. Van Stryland, David J. Hagan Vladislav Dubikovsky and Edward J. Miesak, J. Am. Chem. Soc. 122, 1217-1218 (1999).

56 Belfield, K. D.; Schafer, K. J.; Hagan, D. J.; Van Stryland, E. W., Negres, R. A. "New Two-Photon Absorbing Fluorene Derivatives: Synthesis and Nonlinear Optical Characterization" Organic Letters, 1, 1575, (1999).

57 "Microfabrication via Two-photon Photoinitiated Polymerization", Belfield, K. D.; Ren, X.; Hagan, D. J.; Van Stryland, E. W.; Dubikovsky, V.; Miesak, E. J., Polym. Mater. Sci. Eng., 81, 79 (1999).

58 A. Kobyakov, D. J. Hagan and E. W. Van Stryland, Analytical approach to dynamics of reverse saturable absorbers, J. Opt. Soc. Am B 17, 1884-1893 (2000).

59 F. E. Hernández, S. Yang, E. W. Van Stryland, and D. J. Hagan, “High dynamic range cascaded-focus optical limiter”, Opt. Lett. 25, 1180 (2000)

60 F. E. Hernández, S. S. Yang, V. Dubikovskiy, W. Shensky III, E. W. Van Stryland and D. J. Hagan, “Dual Focal Plane Visible Optical Limiter”, J. Nonlin. Opt. Phys & Mat., 9, 423-440 (2000).

61 “Investigation of Optical Limiting Mechanisms in Multi-Walled Carbon Nanotubes”, X. Sun, Y.

Xiong, P. Chen, J. Lin, Wei Ji, J. Lim, S. Yang, D. Hagan and E. Van Stryland, Appl. Opt., 39, 1998-2001 (2000).

62 “Optical-limting properties of neutralnickel dithiolenes”, W.L. Tan, W. Ji, J.L. Zuo, J.F. Bai, X.Z. You, J.H. Lim, S. Yang, D.J. Hagan, E.W. Van Stryland, Appl. Phys. B70 809-812 (2000).

63 O. Przhonska, D. Hagan, E. Novikov, R. Lepkowicz, E. Van Stryland, , M. Bondar, Yu. Slominsky, A. Kachkovski, ”Picosecond absorption anisotropy of polymethine and squarylium dyes in liquid and polymeric media”, Chem. Phys., 273, 235-248 (2001).

64 "Wavelength independent "Babinet Compensator Optical Limiter", F. E. Hernández, S. Yang, D. Hagan, and E. W. Van Stryland, Molecular Crystals And Liquid Crystals, 358: 301-310 2001.

65 (INVITED) The nature of excited-state absorption in polymethine and squarylium molecules, Negres, R.A. ; Przhonska, O.V.; Hagan, D.J.; Van Stryland, E.W.; Bondar, M.V.; Slominsky, Y.L.; Kachkovski, A.D., IEEE Journal of Selected Topics in Quantum Electronics, Volume 7, Issue 5, 2001, Pages 849-863

66 Raluca Negres, Joel Hales, Andrey Kobyakov, David Hagan, and Eric Van Stryland, “Two-Photon Spectroscopy and Analysis with a White-Light Continuum Probe”, Optics Letters, 27, 270-272 (2002).

67 Florencio Hernandez, William Shensky III, Ion Cohanoschi, David Hagan and Eric Van Stryland, “Viscosity Dependence of Optical Limiting in Carbon Black Suspensions”, Applied Optics, 41, 1103-1107 (2002).

68 “Two-photon spectroscopy and analysis with a white-light continuum probe” Raluca A. Negres, Joel M. Hales, Andrey Kobyakov, David J. Hagan, Eric W. Van Stryland, Opt. Lett., Volume 27, Issue 4, 270-272 (2002 )

69 Negres RA, Hales JM, Kobyakov AK, Hagan DJ, Van Stryland EW, “Experiment and Analysis of Two-Photon Absorption Spectroscopy Using a White-Light Continuum Probe“, IEEE JQE 38 (9), 1205-1216 (2002).

70 F.E. Hernandez, W. Shensky III, I. Cohanoschi, D.J. Hagan, E.W. Van Stryland, “Viscosity dependence of optical limiting in carbon black suspensions”, Applied Optics, 41, 1103-1107 (2002)

71 R. Lepkowicz, A. Kobyakov, D.J. Hagan, E.W. Van Stryland, “Picosecond optical limiting in reverse saturable absorbers: a theoretical and experimental study”, J. Opt. Soc. Am. B, 19, 94-101 (2002)

72 J. Hales, K. J. Schafer, A. M. Morales, K. D. Belfield, D. J. Hagan, and E. W. Van Stryland, "Nonlinear optical characterization for a set of fluorene push-pull chromophores," Crystalline Materials and Technologies”, 709, 219-228 (2002).

73 Belfield KD, Liu Y, Negres RA, Fan M, Pan G, Hagan DJ, Hernandez FE, “Two-photon photochromism of an organic material for holographic recording” Chemistry of Materials, 14 (9): 3663-3667 (2002)

74 Lepkowicz RS, Przhonska OV, Hales JM, Hagan DJ, Van Stryland EW, Bondar MV, Slominsky YL, Kachkovski AD, “Excited-state absorption dynamics in polymethine dyes detected by polarization-resolved pump-probe measurements” Chemical Physics, 286 (2-3): 277-291 (2003)

75 Katherine J. Schafer , Joel M. Hales , Mihaela Balu , Kevin D. Belfield , Eric W. VanStryland and David J. Hagan, “Two-photon absorption cross-sections of common photoinitiators”, Journal of Photochemistry and Photobiology A: Chemistry, Volume 162, Issues 2-3, (2004) Pages 497-502.

76 Richard S. Lepkowicz, Claudiu M. Cirloganu ,Olga V. Przhonska, David J. Hagan, Eric W. Van Stryland, Mikhail V. Bondar, Yuriy L. Slominsky, Alexei D. Kachkovski, Elena I. Mayboroda “Absorption Anisotropy Studies of Polymethine Dyes” Chemical Physics, (Accepted for Publication, 2004)

77 Richard S. Lepkowicz, Olga V. Przhonska, Joel M. Hales, Jie Fu, David J. Hagan, Eric W. Van Stryland, Mikhail V. Bondar, Yuriy L. Slominsky, Alexei D. Kachkovski, “Nature of the electronic transitions in thiacarbocyanines with a long polymethine chain” Chemical Physics, 305, 259-270, (2004)

78 Mihaela Balu, Joel Hales, David J. Hagan, Eric W. Van Stryland, “White-light continuum Z-scan technique for nonlinear materials characterization” Optics Express 12 (16): 3820-3826

79 Joel M. Hales, David J. Hagan, Eric W. Van Stryland, K. J. Schafer, A. M. Morales, K. D. Belfield, Peter Pacher, Ohyun Kwon, Egbert Zojer and Jean-Luc Bredas “Resonant Enhancement of Two-Photon Absorption In Substituted Fluorene Molecules,” Journal of Chemical Physics 121 (7): 3152-3160 (2004).

80 Belfield KD, Morales AR, Hales JM, Hagan DJ, Van Stryland EW, Chapela VM, Percino J., “Linear and two-photon photophysical properties of a series of symmetrical diphenylaminofluorenes” Chemistry of Materials 16 (11): 2267-2273 (2004)

81 L. Beverina, J. Fu, A. Leclercq, E. Zojer, P. Pacher, S. Barlow, E.W. Van Stryland, D.J. Hagan, J.-L. Brédas, S.R. Marder*, "Strong Two-Photon Absorption at Telecommunications Wavelengths in a Dipolar Chromophore with a Pyrrole Auxiliary Donor and Thiazole Auxiliary Acceptor", J. Am. Chem. Soc., 2005, 127, 7282-7283.

82 Baluq, M. ; Hales, J.; Hagan, D.J.; Van Stryland, E.W.; Bakunov, M.I.; Maslov, A.V.; Bodrov, S.B.; Liangfeng Sun; Cattaneo, S.; Figliozzi, P.; Yingying Jiang; Yong Qiang An., Nonlinear spectrometer using a white-light continuum Z scan, Optics & Photonics News, Volume 16, Issue 12, 2005, Page 28,

83 Lepkowicz, R.S. ; Cirloganu, C.M.; Jie Fu; Przhonska, O.V.; Hagan, D.J.; Van Stryland, E.W.; Bondar, M.V.; Slominsky, Y.L.; Kachkovski, A.D., Femtosecond-to-nanosecond nonlinear spectroscopy of polymethine molecules, Journal of the Optical Society of America B (Optical Physics), Volume 22, Issue 12, 2005, Pages 2664-2685,

84 Padilha, L.A. ; Fu, J.; Hagan, D.J.; Van Stryland, E.W.; Cesar, C.L.; Barbosa, L.C.; Cruz, C.H.B., Two-photon absorption in CdTe quantum dots, Optics Express, Volume 13, Issue 18, (2005).

85 Belfield, K.D. ; Sheng Yao; Morales, A.R.; Hales, J.M.; Hagan, D.J.; Van Stryland, E.W.; Chapela, V.M.; Percino, J., Synthesis and characterization of novel rigid two-photon absorbing polymers, Polymers for Advanced Technologies, 16, , Pages 150-155 (2005)

86 Yuhua Huang; Jie Fu; Hagan, D.J.; Shin-Tson Wu; Xiaohua Huang; El-Sayed, M.A.; Ultraviolet protection using intensity-dependent spectral shift in bacteriorhodopsin,, IEEE J. Sel. Topics Quantum Electron., 11, 902 – 905 (2005)

87 Alma R. Morales, Kevin D. Belfield, Joel M. Hales, Eric W. Van Stryland and David J. Hagan, “Synthesis of Two-Photon Absorbing Unsymmetrical Fluorenyl-Based Chromophores” Chem. Mater., 18 (20), 4972 -4980, (2006)

88 Bhaskar, A.; Ramakrishna, G.; Goodson, T.; Lu, Z. K.; Twieg, R. J.; Hales, J. M.; Hagan, D. J.; van Stryland, E., PHYS 543-The synthesis, two-photon absorption properties, and excited state dynamics of six novel nitrogen centered branched chromophores. Abstr. Pap. Am. Chem. Soc. 232 (2006),.

89 Zheng, S. J.; Biesso, A.; Fu, J.; Hales, J. M.; Chung, S. J.; Mesganaw, T.; Odani, T.; Barlow, S.; Perry, J. W.; Van Stryland, E. W.; Hagan, D. J.; Marder, S. R., Synthesis and nonlinear optical properties studies of extended squaraine chromophores. Abstr. Pap. Am. Chem. Soc. 231 (2006),.

90 Ajit Bhaskar, Guda Ramakrishna, Zhikuan Lu, Robert Twieg, Joel M. Hales, David J. Hagan, Eric Van Stryland, and Theodore Goodson III, “Investigation of Two-Photon Absorption Properties in Branched Alkene and Alkyne Chromophores”, J. Am. Chem. Soc., 128 (36), 11840 -11849 (2006)

91 Sung-Jae Chung, Shijun Zheng, Toru Odani, Luca Beverina, Jie Fu, Lazaro A. Padilha, Arianna Biesso, Joel M. Hales, Xiaowei Zhan, Karin Schmidt, Aijun Ye, Egbert Zojer, Stephen Barlow, David J. Hagan, Eric W. Van Stryland, Yuanping Yi, Zhigang Shuai, Giorgio A. Pagani, Jean-Luc Brédas, Joseph W. Perry, and Seth R. Marder, “Extended Squaraine Dyes with Large Two-Photon Absorption Cross-Sections”, J. Am. Chem. Soc., 128 (45), 14444 -14445 (2006)

92 “Experimental and theoretical approaches to understanding two-photon absorption spectra in polymethine and squaraine molecules”, J Fu, LA Padilha, DJ Hagan, EW Van Stryland, OV Przhonska, MV Bondar, YL Slominsky, AD Kachkovski, Journal of the Optical Society of America B-Optical Physics 24 (1): 67-76 (2007).

93 “Molecular structure - two-photon absorption property relations in polymethine dyes”, J Fu, LA Padilha, DJ Hagan, EW Van Stryland, OV Przhonska, MV Bondar, YL Slominsky, AD Kachkovski, Journal of the Optical Society of America B-Optical Physics 24 (1): 56-66 (2007).

94 J.-Y. Cho, S. Barlow, S.R. Marder, J. Fu, L.A. Padilha, E.W. Van Stryland, D.J. Hagan, and M. Bishop, "Strong Two-Photon Absorption at Telecommunications Wavelengths in Nickel Bis(dithiolene) Complexes", Opt. Lett., 2007, 32, 671-673.

95 S. Zheng, A. Leclercq, J. Fu, L. Beverina, L.A. Padilha, E. Zojer, K. Schmidt, S. Barlow, J. Luo, S.-H. Jiang, A.K.-Y. Jen, Y. Yi, Z. Shuai, E.W. Van Stryland, D.J. Hagan, J.-L. Brédas, S.R. Marder, "Two-photon Absorption in Quadrupolar Bis(Acceptor)-terminated Chromophores with Electron-rich Bis(heterocycle)vinylene Bridges", Chem. Mater., 2007, 19, 432-442.

96 S. Zheng, L. Beverina, S. Barlow, E. Zojer, J. Fu, L.A. Padilha, C. Fink, O. Kwon, Y. Yi, Z. Shuai, E.W. Van Stryland, D. Hagan, J.-L. Brédas, S. Marder, "High two-photon cross-sections in bis(diarylaminostyryl) chromophores with electron-rich heterocycle and bis(heterocycle)vinylene bridge", Chem. Commun. 2007, 1372-1374.

97 L. A. Padilha, J. Fu, D. J. Hagan, E. W. Van Stryland, C. L. Cesar, L. C. Barbosa, C. H. B. Cruz, D. Buso, and A. Martucci, "Frequency degenerate and nondegenerate two-photon absorption spectra of semiconductor quantum dots," Physical Review B, vol. 75, Feb 2007.

98 Jie Fu; Przhonska, O.V.; Padilha, L.A.; Hagan, D.J.; Van Stryland, E.W.; Belfield, K.D.; Bondar, M.V.; Slominsky, Y.L.; Kachkovski, A.D., “Two-photon anisotropy: Analytical description and molecular modeling for symmetrical and asymmetrical organic dyes” Chemical Physics, 321 (3), 257-268 (2006)

99 M. Balu, L. A. Padilha, D. J. Hagan, E. W. Van Stryland, S. Yao, K. Belfield, S. J. Zheng, S. Barlow, and S. Marder, "Broadband Z-scan characterization using a high-spectral-irradiance, high-quality supercontinuum," Journal of the Optical Society of America B-Optical Physics, vol. 25, pp. 159-165, Feb 2008.

100 J. Y. Cho, J. Fu, L. A. Padilha, S. Barlow, E. W. Van Stryland, D. J. Hagan, M. Bishop, and S. R. Marder, "Synthesis of a nickel bis(dithiolene) complex with strong near-infrared two-photon absorption," 2008, pp. 915-927.

101 V. Dubikovskiy, D. J. Hagan, and E. W. Van Stryland, "Large nonlinear refraction in InSb at 10 mu m and the effects of Auger recombination," Journal of the Optical Society of America B-Optical Physics, vol. 25, pp. 223-235, Feb 2008.

102 Yao, S.; Belfield, K. D.; Fu, J.; Hagan, D.; Van Stryland, E. W., ORGN 136-Synthesis of donor-acceptor-donor two-photon absorbing fluorene derivatives. Abstr. Pap. Am. Chem. Soc. 2008, 236.

103 C. M. Cirloganu, P. D. Olszak, L. A. Padilha, S. Webster, D. J. Hagan, and E. W. Van Stryland, "Three-photon absorption spectra of zinc blende semiconductors: theory and experiment", Optics Letters 33, 2626 (2008).

104 L. A. Padilha, S. Webster, H. H. Hu, O. V. Przhonska, D. J. Hagan, E. W. Van Stryland, M. V. Bondar, I. G. Davydenko, Y. L. Slominsky, and A. D. Kachkovski, "Excited state absorption and decay kinetics of near IR polymethine dyes," Chemical Physics, vol. 352, pp. 97-105, Sep 2008.

105 S. Webster, J. Fu, L. A. Padilha, O. V. Przhonska, D. J. Hagan, E. W. Van Stryland, M. V. Bondar, Y. L. Slominsky, and A. D. Kachkovski, "Comparison of nonlinear absorption in three similar dyes: Polymethine, squaraine and tetraone," Chemical Physics, vol. 348, pp. 143-151, Jun 2008.

106 S. Webster, L. A. Padilha, H. H. Hu, O. V. Przhonska, D. J. Hagan, E. W. Van Stryland, M. V. Bondar, I. G. Davydenko, Y. L. Slominsky, and A. D. Kachkovski, "Structure and linear spectroscopic properties of near IR polymethine dyes," Journal of Luminescence, vol. 128, pp. 1927-1936, Dec 2008.

107 I.-C. Khoo, S. Webster, S. Kubo, W. Justin Youngblood, J. Liou, A. Diaz, T.E. Mallouk, P. Lin, D. Peceli, L.A. Padilha, D.J. Hagan, and E.W. Van Stryland, “Synthesis and characterization of the multi-photon absorption and excited-state properties of 4-propyl 4’-butyl diphenyl acetylene”, J. Mater. Chem. 19, 7525, (2009).

108 L.A. Padilha, S. Webster, O.V. Przhonska, H. Hu, D. Peceli, J.L. Rosch, M.V. Bondar, A.O. Gerasov, Y.P. Kovtun, M.P. Shandura, A.D. Kachkovski, D.J. Hagan, and E.W. Van Stryland, “Nonlinear absorption in a series of Donor-π-Acceptor cyanines with different conjugation lengths” J. Mater. Chem. 19, 7503, (2009).

109 Z. An, S.A. Odom, R. Kelley, C. Huang, S. Barlow, X. Zhang,L.A. Padilha, J. Fu, S. Webster, D.J. Hagan, E.W. Van Stryland, and S. Marder, “Synthesis and Photophysical Properties of Donor- and Acceptor-Substituted 1,7-Di(arylalkynyl)perylene-3,4:9,10-bis(dicarboximide)s", The Journal of Physical Chemistry, J. Phys. Chem. A 113, 5585, (2009).

110 S.A. Odom, S. Webster, L.A. Padilha, D. Peceli, H. Hu, G. Nootz, S.J. Chung, J.D. Matichak, O.V. Przhonska, A.D. Kachkovski, S. Barlow, H.L. Anderson, D.J. Hagan, E.W. Van Stryland, and S.R. Marder,” Synthesis and Two-Photon Spectrum of a Bis(Porphyrin)-Substituted Squaraine” JACS 131, 7510-7511 (2009).

111 S. Webster, S.A. Odom, L.A. Padilha, O.V. Przhonska, D. Peceli, H. Hu, G. Nootz, A. D. Kachkovski, J. Matichak, S. Barlow, H.L. Anderson, S.R. Marder, D.J. Hagan and E.W. Van Stryland, “Linear and Nonlinear Spectroscopy of a Porphyrin−Squaraine−Porphyrin Conjugated System” J. Phys. Chem. B 113 (45), 14854–14867, (2009).

112 S.A. Odom, R.F. Kelley, S. Ohira, T.R. Ensley, C.Huang, L.A. Padilha, S. Webster, V. Coropceanu, S. Barlow, D.J. Hagan, E.W. Van Stryland, J-L Brdas, H.L. Anderson, M.R. Wasielewski and S.R. Marder, “Photophysical Properties of an Alkyne-Bridged Bis(zinc porphyrin)−Perylene Bis(dicarboximide) Derivative” J. Phys. Chem. A 113 (40), 10826–10832, (2009).

113 M. Balu, L. Padilha, D. Hagan, E. Van Stryland, S. Yao, K. Belfield, S. Zheng, S. Barlow, and S. Marder, "Broadband Z-scan characterization using a high-spectral-irradiance, high-quality supercontinuum: erratum," J. Opt. Soc. Am. B 26, 1663-1663 (2009).

114 S Yao, HY Ahn, XH Wang, J Fu, EW Van Stryland, DJ Hagan, KD Belfield, "Donor-Acceptor-Donor Fluorene Derivatives for Two-Photon Fluorescence Lysosomal Imaging" JOURNAL OF ORGANIC CHEMISTRY Volume: 75 Issue: 12 Pages: 3965-3974 (2010)

115 LA Padilha, S Webster, OV Przhonska, H Hu, D Peceli, TR Ensley, MV Bondar, AO Gerasov, YP Kovtun, MP Shandura, AD Kachkovski, DJ Hagan, EW Van Stryland, "Efficient Two-Photon Absorbing Acceptor-pi-Acceptor Polymethine Dyes" J. Phys. Chem. A Volume: 114 Issue: 23 Pages: 6493-6501 (2010)

116 F Terenziani, OV Przhonska, S Webster, LA Padilha, YL Slominsky, IG Davydenko, AO Gerasov, YP Kovtun, MP Shandura, AD Kachkovski, DJ Hagan, EW Van Stryland, A Painelli, "Essential-State Model for Polymethine Dyes: Symmetry Breaking and Optical Spectra", J. Phys. Chem.Lett , Volume: 1 Issue: 12 Pages: 1800-1804 (2010)

117 S Webster, D Peceli, H Hu, LA Padilha, OV Przhonska, AE Masunov, AO Gerasov, AD Kachkovski, YL Slominsky, AI Tolmachev, VV Kurdyukov, OO Viniychuk, E Barrasso, R Lepkowicz, DJ Hagan, EW Van Stryland, "Near-Unity Quantum Yields for Intersystem Crossing and Singlet Oxygen Generation in Polymethine-like Molecules: Design and Experimental Realization", J. Phys. Chem.Lett., 1, 2354-2360 (2010)

118 Eric W. Van Stryland, David J. Hagan, Olga V. Przhonska, Seth R. Marder, Scott Webster and Lazaro A. Padilha’ "Nonlinear Absorption Spectroscopy of Organic Dyes", Nonlinear Optics, Quantum Optics, Volume 40, Number 1-4, p. 95-113, (2010)

119 G Nootz, LA Padilha, PD Olszak, S Webster, DJ Hagan, EW Van Stryland, L Levina, V Sukhovatkin, L Brzozowski, EH Sargent, "Role of Symmetry Breaking on the Optical Transitions in Lead-Salt Quantum Dots", Nano Lett. Volume: 10 Issue: 9 Pages: 3577-3582 (2010)

120 P. D. Olszak, C. M. Cirloganu, S. Webster, L. A. Padilha, S. Guha, L. P. Gonzalez, S. Krishnamurthy, D. J. Hagan, and E. W. Van Stryland, "Spectral and temperature dependence of two-photon and free-carrier absorption in InSb," Physical Review B 82 (23) (2010).

121 David J. Hagan, "From the Editor: Inaugural Editorial for Optical Materials Express," Opt. Mater. Express 1, 1-2 (2011)

122 C. M. Cirloganu, L. A. Padilha, D. A. Fishman, S. Webster, D. J. Hagan, and E. W. Van Stryland, "Extremely nondegenerate two-photon absorption in direct-gap semiconductors Invited," Optics Express 19 (23), 22951-22960 (2011).

123 S. Ellinger, K. R. Graham, P. J. Shi, R. T. Farley, T. T. Steckler, R. N. Brookins, P. Taranekar, J. G. Mei, L. A. Padilha, T. R. Ensley, H. H. Hu, S. Webster, D. J. Hagan, E. W. Van Stryland, K. S. Schanze, and J. R. Reynolds, "Donor-Acceptor-Donor-based pi-Conjugated Oligomers for Nonlinear Optics and Near-IR Emission," Chemistry of Materials 23 (17), 3805-3817 (2011).

124 T. R. Ensley, D. A. Fishman, S. Webster, L. A. Padilha, D. J. Hagan, and E. W. Van Stryland, "Energy and spectral enhancement of femtosecond supercontinuum in a noble gas using a weak seed," Optics Express 19 (2), 757-763 (2011).

125 D. A. Fishman, C. Cirloganu, S. Webster, L. A. Padilha, M. Monroe, D. J. Hagan, and E. W. Van Stryland, "Sensitive mid-infrared detection in wide-bandgap semiconductors using extreme non-degenerate two-photon absorption," Nature Photonics 5 (9), 561-565 (2011).

126 G. Nootz, L. A. Padilha, L. Levina, V. Sukhovatkin, S. Webster, L. Brzozowski, E. H. Sargent, D. J. Hagan, and E. W. Van Stryland, "Size dependence of carrier dynamics and carrier multiplication in PbS quantum dots," Physical Review B 83 (15) (2011).

127 L. A. Padilha, G. Nootz, P. D. Olszak, S. Webster, D. J. Hagan, E. W. Van Stryland, L. Levina, V. Sukhovatkin, L. Brzozowski, and E. H. Sargent, "Optimization of Band Structure and Quantum-Size-Effect Tuning for Two-Photon Absorption Enhancement in Quantum Dots," Nano Letters 11 (3), 1227-1231 (2011).

128 D.A. Fishman, C.M. Cirloganu, S. Webster, L.A. Padilha, D.J. Hagan and E.W. Van Stryland, “Extremely Nondegenerate Two-Photon Absorption and Subbandgap Detection in Semiconductors” Optics and Photonics News, Feature “Optics in 2011”, 22 (12), 25-25, (2011)

129 Yulia A. Getmanenko, Joel M. Hales, Mihaela Balu, Jie Fu, Egbert Zojer, Ohyun Kwon, Jeffrey Mendez, S. Thayumanavan, Gregory Walker, Qing Zhang, Scott D. Bunge, Jean-Luc Brédas, David J. Hagan, Eric W. Van Stryland, Stephen Barlow and Seth R. Marder, “Characterisation of a dipolar chromophore with third-harmonic generation applications in the near-IR” J. Mater. Chem., 22(10), 4371-4382 (2012).

130 David J. Hagan, "Message from the Editor," Opt. Mater. Express 2, 1-1 (2012) 131 Ferdinandus, M. R., M. Reichert, et al. (2012). "Dual-arm Z-scan technique to extract dilute solute

nonlinearities from solution measurements." Optical Materials Express 2(12): 1776-1790 (2012). 132 Getmanenko, Y. A., J. M. Hales, et al. (2012). "Characterisation of a dipolar chromophore with

third-harmonic generation applications in the near-IR." Journal of Materials Chemistry 22(10): 4371-4382.

133 Hu, H. H., D. A. Fishman, et al. (2012). "Two-Photon Absorption Spectrum of a Single Crystal Cyanine-like Dye." Journal of Physical Chemistry Letters 3(9): 1222-1228.

134 Hu, H. H., O. V. Przhonska, et al. (2013). "Two-photon absorption spectra of a near-infrared 2-azaazulene polymethine dye: solvation and ground-state symmetry breaking." Physical Chemistry Chemical Physics 15(20): 7666-7678.

135 Peceli, D., H. H. Hu, et al. (2013). "Enhanced Intersystem Crossing Rate in Polymethine-Like Molecules: Sulfur-Containing Squaraines versus Oxygen-Containing Analogues." Journal of Physical Chemistry A 117(11): 2333-2346.

136 Manuel R. Ferdinandus, Honghua Hu, Matthew Reichert, David J. Hagan, and Eric W. Van Stryland, "Beam deflection measurement of time and polarization resolved ultrafast nonlinear refraction," Opt. Lett. 38, 3518-3521 (2013)

137 Matthew Reichert, Honghua Hu, Manuel R. Ferdinandus, Marcus Seidel, Peng Zhao, Trenton R. Ensley, Davorin Peceli, Jennifer M. Reed, Dmitry A. Fishman, Scott Webster, David J. Hagan, Eric W. Van Stryland, "Temporal, spectral, and polarization dependence of the nonlinear optical response of carbon disulfide", Optica, Vol. 1, 436-445 (2014) (2014)

138 Zhong'an Li, Trenton R. Ensley, Honghua Hu, Yadong Zhang, Sei-Hum Jang, Seth R. Marder, David J. Hagan, Eric W. Van Stryland, Alex K.-Y. Jen, "Conjugated Polycyanines: A New Class of Materials with Large Third-Order Optical Nonlinearities", Advanced Optical Materials doi: 10.1002/adom.201400631 (Early View - Online Version of Record published before inclusion in an issue) (2015)

139 L. Bekere, V. Lokshin, M. Sigalov, R. Gvishi, P. Zhao, D.J. Hagan, E.W. Van Stryland, V. Khodorkovsky "Chromenes involving a two-photon absorbing moiety: photochromism via

intramolecular resonance energy transfer ", New Journal of Chemistry (2015) 140 M. Reichert, P. Zhao, J.M. Reed, T.R. Ensley, D.J. Hagan, E.W. Van Stryland, "Beam deflection

measurement of bound-electronic and rotational nonlinear refraction in molecular gases ", Optics Express 23, pp.22224-22237 (2015)

141 Nathaniel Kinsey, Akbar Ali Syed, Devon Courtwright, Clayton DeVault, Carl E. Bonner, Vladimir I. Gavrilenko, Vladimir M. Shalaev, David J. Hagan, Eric W. Van Stryland, and Alexandra Boltasseva, "Effective third-order nonlinearities in metallic refractory titanium nitride thin films," Opt. Mater. Express 5, 2395-2403 (2015)

142 Rebecca L. Gieseking, Trenton R. Ensley, Honghua Hu, David J. Hagan, Chad Risko, Eric W. Van Stryland, and Jean-Luc Brédas, “Nonlinear Optical Properties of X(C6H5)4 (X = B–, C, N+, P+) A New Class of Molecules with a Negative Third-Order Polarizability”, Journal of the American Chemical Society 2015 137 (30), 9635-9642, DOI: 10.1021/jacs.5b04377

143 David J. Hagan, Jerry Dadap, Yanqing Lu, Nicolae C. Panoiu, Mansoor Sheik-Bahae, and Takunori Taira, "Introduction: Nonlinear Optics (NLO) 2015 feature issue," Opt. Mater. Express 6, 466-468 (2016)

144 David J. Hagan, "A retrospective on the first five years: editorial," Opt. Mater. Express 6, 251-251 (2016)

145 Himansu S. Pattanaik, Matthew Reichert, David J. Hagan, and Eric W. Van Stryland, "Three-dimensional IR imaging with uncooled GaN photodiodes using nondegenerate two-photon absorption," Opt. Express 24, 1196-1205 (2016)

146 Himansu Pattanaik; Matthew Reichert; Jacob Khurgin; David Hagan; Eric Van Stryland, “Enhancement of Two-photon Absorption in Quantum Wells for Extremely Nondegenerate Photon Pairs”, IEEE Journal of Quantum Electronics, IEEE Journal Of Quantum Electronics, Vol. 52, No. 3, March 2016, DOI:10.1109/JQE.2016.2526611

147 T. Liu, M. Bondar, K. Belfield, D. Anderson, A. Masunov, D.J. Hagan, and E.W. Van Stryland, "Linear Photophysics and Femtosecond Nonlinear Spectroscopy of a Star-Shaped Squaraine Derivative With Efficient Two-Photon Absorption", Journal Of Physical Chemistry C 120(20), pp.11099-11110, (2016).

148 M. Reichert, P. Zhao, J.M. Reed, T.R. Ensley, D.J. Hagan, and E.W. Van Stryland, "Beam deflection measurement of bound-electronic and rotational nonlinear refraction in molecular gases", Optics Express 24(17), pp.19122-19122, (2016).

149 P. Zhao, M. Reichert, D.J. Hagan and E.W. Van Stryland, "Dispersion of nondegenerate nonlinear refraction in semiconductors ", Optics Express 24(22), pp.24907-24920, (2016).

150 I. Davydenko, S. Barlow, R. Sharma, S. Benis, J. Simon, T.G. Allen, M.W. Cooper, V. Khrustalev, E.V. Jucov, R. Castaneda, C. Ordonez, Z.A. Li, S.H. Chi, S.H. Jang, T.C. Parker, T.V. Timofeeva, J.W. Perry, A.K.Y. Jen, D.J. Hagan, E.W. Van Stryland, and S.R. Marder, "Facile Incorporation of Pd(PPh3)(2)Hal Substituents into Polymethines, Merocyanines, and Perylene Diimides as a Means of Suppressing Intermolecular Interactions", Journal Of The American Chemical Society 138(32), pp.10112-10115, (2016).

151 D.J. Hagan, J. Dadap, Y.Q. Lu, N.C. Panoiu, M. Sheik-Bahae, and T. Taira, "Introduction: Nonlinear Optics (NLO) 2015 feature issue", Optical Materials Express 6(2), pp.466-468, (2016).

152 C. Shanor, T. Ensley, D.J. Hagan, E.W. Van Stryland, E.M. Wright, and M. Kolesik , "Numerical

investigation of enhanced femtosecond supercontinuum via a weak seed in noble gases ", Optics Express, pp. 15110-15119, (2016).

153 M. Reichert, A.L. Smirl, G. Salamo, D.J. Hagan, and E.W. Van Stryland, "Observation of Nondegenerate Two-Photon Gain in GaAs", Physical Review Letters 117(7), (2016).

154 T.R. Ensley, H.H. Hu, M. Reichert, M.R. Ferdinandus, D. Peceli, J.M. Hales, J.W. Perry, Z.A. Li, S.H. Jang, A.K.Y. Jen, S.R. Marder, D.J. Hagan, and E.W. Van Stryland, "Quasi-three-level model applied to measured spectra of nonlinear absorption and refraction in organic molecules ", Journal Of The Optical Society Of America B-Optical Physics 33(4), pp.780-796, (2016).

155 T.R. Ensley, H.H. Hu, M. Reichert, M.R. Ferdinandus, D. Peceli, J.M. Hales, J.W. Perry, Z.A. Li, S.H. Jang, A.K.Y. Jen, S.R. Marder, D.J. Hagan, and E.W. Van Stryland, "Quasi-three-level model applied to measured spectra of nonlinear absorption and refraction in organic molecules (vol 33, pg 780, 2016)", Journal Of The Optical Society Of America B-Optical Physics 33(5), pp.1007-1007, (2016).

156 M. Reichert, H.H. Hu, M.R. Ferdinandus, M. Seidel, P. Zhao, T.R. Ensley, D. Peceli, J.M. Reed, D.A. Fishman, S. Webster, D.J. Hagan, and E.W. Van Stryland, "Temporal, spectral, and polarization dependence of the nonlinear optical response of carbon disulfide", Optica 3(6), pp.657-658, (2016).

157 Z. Li, P. Zhao, S. Tofighi, R. Sharma, T.R. Ensley, S.H. Jang, D.J. Hagan, E.W. Van Stryland, and A.K.Y. Jen, "Zwitterionic Cyanine-Cyanine Salt: Structure and Optical Properties", The Journal of Physical Chemistry C, Vol. 120, pp. 15378-15384, (2016).

158 Peng Zhao, Salimeh Tofighi, Ryan M. O’Donnell, Jianmin Shi, Peter Y. Zavalij, Mykhailo V. Bondar, David J. Hagan, and Eric W. Van Stryland, “Electronic Nature of New Ir(III) Complexes: Linear Spectroscopic and Nonlinear Optical Properties”, The Journal of Physical Chemistry C 121(42), pp. 23609-23617 (2017) DOI: 10.1021/acs.jpcc.7b06254

159 Peng Zhao, Matthew Reichert, Sepehr Benis, David J. Hagan, and Eric W. Van Stryland, "Temporal and polarization dependence of the nonlinear optical response of solvents," Optica 5, 583-594 (2018)

160 Zhao, P., Tofighi, S., O'Donnell, R. M., Shi, J., Bondar, M.V., Hagan, D.J., and Van Stryland, E. W., "Dual Emissive Multinuclear Iridium(III) Complexes in Solutions: Linear Photophysical Properties, Two-Photon Absorption Spectra, and Photostability", Journal of Physical Chemistry C, 122(12), pp. 6786-6793 (2018)

161 V.P. Drachev, A.V. Kildishev, J.D. Borneman, K.P. Chen, V.M. Shalaev, K. Yamnitskiy, R.A. Norwood, N. Peyghambarian, S.R. Marder, L.A. Padilha, S. Webster, T.R. Ensley, D.J. Hagan, and E.W. Van Stryland, "Engineered nonlinear materials using gold nanoantenna array", Scientific Reports, DOI:10.1038/s41598-017-19066-3 (2018)

162 Siarhei A. Kurhuzenkau, Maria Yezabel Colon Gomez, Kevin D. Belfield, Yevgeniy O. Shaydyuk, David J. Hagan, Eric W. Van Stryland, Cristina Sissa, Mykhailo V. Bondar, and Anna Painelli, "Electronic nature of nonlinear optical properties of a symmetrical two-photon absorbing fluorene derivative: experimental study and theoretical modeling", Journal of Physical Chemistry C, 122 (10), pp 5664–5672 (2018)

163 I. Davydenko, S. Benis, S.B. Shiring, J. Simon, R. Sharma, T.G. Allen, S.H. Chi, Q. Zhang, Y.A. Getmanenko, T.C. Parker, J.W. Perry, J.L. Bredas, D.J. Hagan, E.W. Van Stryland, S. Barlow, S.R. Marder, "Effects of meso-M (PPh 3) 2 Cl (M= Pd, Ni) substituents on the linear and third-order

nonlinear optical properties of chalcogenopyrylium-terminated heptamethines in solution and solid states", J. Mater. Chem. C, 2018,6, 3613-3620

164 T.R. Ensley, S. Benis, H. Hu, Z. Li, S.H. Jang, A.K.Y. Jen, J.W. Perry, J.M. Hales, D.J. Hagan, and E.W. Van Stryland, "Nonlinear refraction and absorption measurements of thin films by the dual-arm Z-scan method", Applied Optics, 58(13), pp. D28-D33 2019

165 Salimeh Tofighi, Peng Zhao, Ryan M. O’Donnell, Jianmin Shi, Peter Y. Zavalij, Mykhailo V. Bondar, David J. Hagan, and Eric W. Van Stryland, “Fast Triplet Population in Iridium(III) Complexes with Less than Unity Singlet to Triplet Quantum Yield”, The Journal of Physical Chemistry C 2019 123 (22), 13846-13855, DOI: 10.1021/acs.jpcc.9b00539

166 T.G. Allen, S. Benis, N. Munera, J.X. Zhang, S.X. Dai, T.F. Li, J. Boyu, W. Wang, S. Barlow, D.J. Hagan, E.W. Van Stryland, X.W. Zhan, J.W. Perry and S. Marder, "Highly Conjugated, Fused-Ring, Quadrupolar Organic Chromophores with Large Two-Photon Absorption Cross-Sections in the Near-Infrared", The Journal of Physical Chemistry A, 124(22), pp. 4367-4378 (2020)

167 Sepehr Benis, Claudiu M. Cirloganu, Nicholas Cox, Trenton Ensley, Honghua Hu, Gero Nootz, Peter D. Olszak, Lazaro A. Padilha, Davorin Peceli, Matthew Reichert, Scott Webster, Milton Woodal, David J. Hagan, Eric W. Van Stryland, "Three-Photon Absorption Spectra and Bandgap Scaling in Direct-Gap Semiconductors", arXiv (2020): arXiv-2005 Accepted for Optica (2020)

D. Conference Proceedings: 1. "Phase Conjugation by Degenerate Four-wave Mixing in Indium Antimonide", C.T. Seaton, H.A.

MacKenzie, W.J. Firth and D.J. Hagan, Proceedings Rochester Conference on Coherence and Quantum Optics V, Plenum (1984).

2. "Measurement of Transverse Coupling Between Adjacent InSb Optical Switching Elements", D.J. Hagan, I. Galbraith, H.A. Mackenzie, W.J. Firth, A.C. Walker, J. Young, and S.D. Smith, Optical Bistability III, Springer-Verlag (1986), p. 189.

3. "Repetition Rate Dependence of the Nonlinear Response of Suspended Particles", M.J. Soileau, K. Mansour, E.W. Van Stryland, E. Canto, and D.J. Hagan, Proc. Joint U.S.-U.K. Conf. on Sensor Protection, Malvern, England (1987).

4. "Temporal and Spatial Distribution of Light from a Monolithic Limiter", M.J. Soileau, D.J. Hagan, Y.Y. Wu, and E.W. Van Stryland, Proc. Joint U.S.-U.K. Conf. on Sensor Protection, Malvern, England (1987).

5. (INVITED)"Nonlinear Beam Propagation in Semiconductors", E.W. Van Stryland, D.J. Hagan, M.J. Soileau and Y.Y. Wu, Proc. Int. Conf. on Lasers '87, (1987).

6. "Optical Damage Protector Based on Self-Defocusing in Semiconductors", M.J. Soileau, E.W. Van Stryland, D.J. Hagan and Y.Y. Wu, Proc. SPIE Vol. 895, (1988)

7. "Optical Limiting with Semiconductors", E.W. Van Stryland, Y.Y. Wu, D.J. Hagan, M.J. Soileau, and K. Mansour, Proceedings of the Meeting on Laser Materials and Laser Spectroscopy, (Shanghai, China, 1988).

8. "Optical Limiting in Solutions of Metallophthalocyanines and Naphthalocyanines", D.R. Coulter, V.M. Miskowsky, J.W. Perry, T.H. Wei, E.W. Van Stryland, and D.J. Hagan, Proceedings of SPIE Vol. 1105, 42 (1989).

9. "Passive Broadband High-Dynamic-Range Semiconductor Limiters", D.J. Hagan, E.W. Van Stryland, J. Young, T.H. Wei, M. Sheik-bahae, A.A. Said, K. Mansour and M.J. Soileau, Proceedings of SPIE Vol. 1105, 103 (1989).

10. "Simple Analysis and Geometric Optimization of a Passive Optical Limiter Based on Internal Self-Action", M. Sheik-Bahae, A.A. Said, D.J. Hagan, M.J. Soileau, and E.W. Van Stryland, Proceedings of SPIE Vol. 1105, 146 (1989).

11. "Sensitive n2 Measurements Using a Single Beam", M. Sheik-Bahae, D.J. Hagan, A. Miller, and E.W. Van Stryland, Proceedings of the 1989 Boulder Damage Conference, (NBS Special Publication, 1989).

12. "Relation Between n2 and Two-Photon Absorption", M. Sheik-bahae, D.J. Hagan, A. Miller, and E.W. Van Stryland, Proceedings of the 1989 Boulder Damage Conference, (NBS Special Publication, 1989).

13. "Z-Scan: A Simple and Sensitive Technique for Nonlinear Refraction Measurements", M. Sheik-Bahae, A.A. Said, T.H. Wei, Y.Y. Wu, D.J. Hagan, M.J. Soileau and E.W. Van Stryland, Proc. SPIE, Vol. 1148-06, (1989).

14. (INVITED): "Measurement of the Fast Electronic n2 Associated with Two-Photon Absorption in Semiconductors", E.W. Van Stryland, M. Sheik-Bahae, D.J. Hagan, T.H. Wei, A.A. Said, J. Young, E. Canto and A. Miller, Proc. Int. Conf. Lasers '89, New Orleans, (December 1989).

15. "Kramers-Kronig Relation Between n2 and Two-Photon Absorption", M. Sheik-Bahae, D.J. Hagan, A.A. Said, J. Young, T.H. Wei, and E.W. Van Stryland, Proc. SPIE Vol. 1370, (1990).

16. "Nonlinearities in Semiconductors for Optical Limiting", A.A. Said, M. Sheik-Bahae, D.J. Hagan, E. Canto, Y.Y. Wu, J. Young, T.H. Wei, and E.W. Van Stryland, Proc. SPIE Vol. 1370 (1990).

17. "Dispersion of n2 in Solids" M.Sheik-Bahae, D.C. Hutchings, D.J. Hagan, M.J. Soileau and E.W. Van Stryland, Proc. Boulder Damage Conference, 1990, (NBS Special Publication, 1990).

18. "Excited State Absorption and Optical Limiting in Solutions of Metallo-Phthalocyanines", J.W. Perry, L.R. Khundkar, D.R. Coulter, T.H. Wei, E.W. Van Stryland and D.J. Hagan, Proc. Nato Workshop on "Organic Materials for Nonlinear Optics and Photonics", La Rochelle, France, (NATO, 1990).

19. "Scaling Laws for Ultrafast All Optical Switching", D.J. Hagan, M. Sheik-Bahae, D.C. Hutchings and E.W. Van Stryland, Proc. LEOS'90 (IEEE, 1990).

20. "Anomalous Dispersion of the Electronic Kerr Effect", D.J. Hagan, Y.Y. Wu, E.Canto, M. Sheik-Bahae, A.A. Said, J. Young, T.H. Wei, M. Junnarkar and E.W. Van Stryland, in "Ultrafast Phenomena VII", Eds. C.B. Harris, E.P. Ippen, G.A. Morou and A.H. Zewail. (Springer-Verlag, 1990).

21. (INVITED): "Bound Electron Nonlinearities and Their Application to Optical Switching", D.J. Hagan, M. Sheik-Bahae, D.C. Hutchings, A.A. Said, T.H. Wei and E.W. Van Stryland, Proc. Int. Conf. Lasers '90, (1990).

22. (INVITED):"New Measurement Method for Nonlinearities in Semiconductors", E.W. Van Stryland, A.A. Said, M. Sheik-Bahae, D.J. Hagan, E.J. Canto-Said, Y.Y. Wu and T.H. Wei, Proc. ISLA-90, (Vilnius, Germany, 1991).

23. "Nonlinear Absorption and Refraction in UV Transmitting Materials" M. Sheik-Bahae, A.A. Said, D.J. Hagan, J. Wang, M.J. Soileau and E.W. Van Stryland, Proceedings of the Boulder Damage Symposium, Boulder, CO, NBS Special Publication (1991).

24. "Self Protecting Optical Limiters Using Cascading Geometries", A.A. Said, R. DeSalvo, M. Sheik-Bahae, D.J. Hagan and E.W. Van Stryland, Proc. SPIE,-1692, 37-44 (1992).

25. "Self-focussing and optical damage in Cr:LiSAF and Cr:LiCAF" M. Richardson, M.J. Soileau, P. Beaud, R. DeSalvo, S. Garnov, D.J. Hagan, S. Klimentov, K. Richardson, M. Sheik-Bahae, A.A. Said, E. W. Van Stryland and B.H.T. Chai., Proc SPIE Vol. 1848.

26. (INVITED)"Characterization of Nonlinear Absorption and Refraction in Advanced Materials", E.W. Van Stryland, M. Sheik-Bahae, A.A. Said and D.J. Hagan. Proc. SPIE - OE-LASE, 1993.

27. “Tandem Limiter Optimization”, D.J. Hagan, T. Xia, A.A. Said and E.W. Van Stryland, proceedings of the SPIE, Vol. 2229, Nonlinear Optical materials for Switching and Limiting, Orlando, FL. (1994).

28. “All Optical Switching Using Second-Order Nonlinearities in KTP”, Z. Wang, D.J. Hagan, M. Sheik-Bahae, R. DeSalvo, G. Stegeman, E.W. Van Stryland and G. Assanto, proceedings of the SPIE, Vol. 2229, Nonlinear Optical materials for Switching and Limiting, Orlando, FL. (1994).

29. “EZ-Scan: Single Beam Measurement Technique for Thin Film Nonlinearities”, T. Xia, M. Sheik-Bahae, Z. Wang, A.A. Said, D.J. Hagan, and E. W. Van Stryland, proceedings of the SPIE, Vol. 2229, Nonlinear Optical Materials for Switching and Limiting, Orlando, FL. (1994).

30. “Optical Nonlinearities in Diamond”, M. Sheik-Bahae, J.R. Desalvo*, A.A. Said, D.J. Hagan, M.J. Soileau and E.W. Van Stryland, Proceedings of the Boulder Damage Conference, SPIE, (1994)

31. (INVITED)”Optimization of Reverse Saturable Absorber Limiters: Material Requirements and Design Consideration” D.J. Hagan, T. Xia*, A. Dogariu*, A.A. Said and E.W. Van Stryland, Proceedings of MRS, Vol. 374, (1995), pp 161-172.

32. “Femtosecond Continuum Probe Measurements of Nonlinearities of Organic Dyes”, P. Buck, A. Dogariu, D.J. Hagan and E.W. Van Stryland, Conf. on Nonlinear Optical Liquids, Proc, SPIE-2853, (1996)

33. “Optical Limiting in Inorganic Metallic Clusters and Carbon Black Suspensions”, A. Dogariu, T. Xia, D.J. Hagan, A.A. Said, E.W. Van Stryland and S. Shi, Conf. on Nonlinear Optical Liquids, Proc, SPIE-2853, (1996)

34. “Two-Beam Coupling in Liquids via Stimulated Rayliegh-Wing Scattering”, A. Dogariu, T. Xia, D.J. Hagan, A.A. Said, E.W. Van Stryland and N. Bloembergen, Conf. on Nonlinear Optical Liquids, Proc, SPIE-2853, (1996)

35. “Liquid-Based Multicell Optical Limiter”, A.A. Said, T. Xia, D.J. Hagan, A. Wajsgrus, S. Yang, D. Kovsh and E.W. Van Stryland, Conf. on Nonlinear Optical Liquids, Proc, SPIE-2853, (1996)

36. “Reverse saturable absorption in polymethine dyes”, S. Khodja, D. J. Hagan, J. Lim, O. V. Przhonska, S. Yang, J. Buckley and E. W. Van Stryland, Proc. SPIE-3146, 12 -21 (1997)

37. “Nonlinear spectrometry of chromophores for optical limiting” D. J. Hagan, E. Miesak, R. Negres, S. Ross, J. Lim and E. W. Van Stryland, Proc. SPIE-3472, 80-90 (1998).

38. “Software for computer modeling of laser pulse propagation through an optical system with nonlinear optical elements.” D. I. Kovsh, S. Yang, D.J. Hagan and E.W. Van Stryland, Proc. SPIE-3472, 163-177 (1998).

39. "Optical Limiting: Characterization and Numerical Modeling” Eric W. Van Stryland, Dmitriy I. Kovsh, Raluca Negres, David J. Hagan, Vladislav Dubikovsky, and Kevin Belfield, NATO Advanced Research Workshop on " Mutiphoton and Light Driven Multielectron Processes in Organics: Materials, Phenomena, Applications", Menton, France, Aug. 1999.

40. “Optical Limiting via nonlinear scattering with sol-gel host materials.” D. J. Hagan, S. Yang, C. Basanez, E. W. Van Stryland, W. V. Moreshead and J.-L. Nouges, Proc SPIE 3798, 17-21 (1999)

41. Invited: “Femtosecond to nanosecond characterization of optical limiting mechanisms in power limiting liquids and solids”, S. Xu, V. Klimov, D. McBranch, S. Flom and J. Shirk, B. Moreshead and J.L. Nogues, D.J. Hagan and E.W. Van Stryland, Proc SPIE 3798, 76-84 (1999)

42. “Nonlinear spectrometer for characterization of organic and polymeric molecules” Raluca A. Negres, Eric W. Van Stryland, David J. Hagan, Kevin D. Belfield, Katherine J. Schafer, Olga V. Przhonska, Bruce A. Reinhardt, Proc SPIE 3798, (1999)

43. Sidney S.Yang, Florencio E. Hernández, Vladislav Dubikovsky, W. Shensky Iii, David J. Hagan, in Proceedings of the Second International Symposium on Optical Power Limiting, Venice, Italy, July 2-5, 2000.

44. “Optical Limiting: Characterization and Numerical Modeling”, Eric W. Van Stryland, Dmitriy I. Kovsh, Raluca Negres, David J. Hagan, Vladislav Dubikovsky, and Kevin Belfield, proceedings NATO Advanced Research Workshop on “ Mutiphoton and Light Driven Multielectron Processes in Organics: Materials, Phenomena, Applications”, in press (1999).

45. “Cascaded Optical Limiters and Modeling”, E. W. Van Stryland, S. S.Yang, F. E. Hernández, V. Dubikovsky, and D. J. Hagan, proceedings of the ISOPL 2000, to be published. (2000).

46. A. Kobyakov, D. J. Hagan, E. W. Van Stryland, "Effect of laser pulse shape on optical limiting properties of reverse saturable absorbers," in Nonlinear Optics: Materials, Fundamentals and Applications, OSA Technical Digest, paper WB1, pp. 196-198 (2000).

47. A. Kobyakov, D. J. Hagan, E. W. Van Stryland, S. Darmanyan, and F. Lederer, "Stability of narrow discrete solitons in quadratic nonlinear media," in Nonlinear Optics: Materials, Fundamentals and Applications, OSA Technical Digest, paper ThB10, pp. 347-349 (2000).

48. A. Kobyakov, D. J. Hagan, and E. W. Van Stryland, "Dynamics of excited-state absorbers: an analytical approach," in Quantum Electronics and Laser Science Conference, OSA Technical Digest, paper QTuA6, pp. 48-49 (2000).

49. V. Dubikovskiy, A. Kobyakov, and D. J. Hagan, "Novel all-optical switching mechanisms in media with quadratic nonlinearity," in Quantum Electronics and Laser Science Conference, OSA Technical Digest, paper QFE5, pp. 262-263 (2000).

50. F. E. Hernández, S. Yang, E. W. Van Stryland and D. J. Hagan, “Electrostriction effect contribution for high dynamic range optical limiters”, in Nonlinear Optics: Materials, Fundamentals and Applications, OSA Technical Digest, paper TuB20, pp. 110-112 (2000).

51. F.E Hernandez, D.J Hagan, "Continuously variable, wavelength-independent polarization rotator" Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39 (2000 )

52. “Optical Limiting with Neutral Nickeo Dithiolene Complexes”, W. L. Tan, Wei Ji, J.F. Bai, J.L. Zuo, X.Z.You, J. Lim, S. Yang, D. Hagan and E. Van Stryland, MRS Proceedings, (2000).

53. “Nonlinear Optical Laser Beam Propagation Through Semiconductor Materials, Shekhar Guha, C. Rayerson, D. Hagan, V. Dubikovsky, E. Van Stryland, and S. Krishnamurthy, MRS Proceedings, (2000).

54. Malko, A.; Xu, S.; Wang, H.-L.; Kohlman, R.; Smilowitz, L.; Klimov, V.; McBranch, D.W.; Nogues, J.-L.; Moreshead, W.; Hagan, D.; Yang, S.; Van Stryland, E, "Femtosecond to nanosecond characterization of optical limiting mechanisms in power limiting liquids and solids", Thin Films for Optical Waveguide Devices and Materials for Optical Limiting. (Materials Research Society Symposium Proceedings Vol.597) (2000)

55. Kevin D. Belfield, David J. Hagan, Yong Liu, Raluca A. Negres, Meigong Fan and F. E. Hernandez, “Two-photon photochromism of a photorefractive organic material for holographic recording”, Proc. SPIE, Vol 4104, 15-22, (2000).

56. “Nonlinear optical spectroscopic characterization of a series of fluorene derivatives, J. M. Hales, K. J. Schafer, A. R. Morales, K. D. Belfield, D. J. Hagan, E. W. Van Stryland, Proceedings of SPIE

Vol. 5211, [5211-05], Nonlinear Optical Transmission and Multiphoton Processes in Organics, San Diego, CA Aug. 2003.

57. “Reactive two-photon fluorescent probes for biological imaging, K. D. Belfield, K. J. Schafer, S. Yao, J. M. Hales, E. W. Van Stryland, D. J. Hagan, Proceedings of SPIE Vol. 5211, [5211-15], Nonlinear Optical Transmission and Multiphoton Processes in Organics, San Diego, CA Aug. 2003.

58. “Two-photon induced excited-state absorption in high-index fibers”, William Shensky III, Ion Cohanoschi, Armen Sevian, David Hagan, and Eric Van Stryland Proceedings of Boulder Damage Symposium, (SPIE, Boulder, 2003)

59. William Shensky III, Ion Cohanoschi, Armen Sevian, David Hagan, and Eric Van Stryland, “Two-photon induced excited-state absorption in high-index glass”, Proceedings if the Boulder Damage Symposium, Proc. SPIE Vol. 5273, p. 115-121, (2004)

60. Belfield, K. D.; Morales, A. R.; Yao, S.; Brice, A.; Hales, J. M.; Hagan, D. J.; Van Stryland, E. W. "New highly efficient two-photon fluorescent dyes" Proc. SPIE - Int. Soc. Opt. Eng., , 5351, p. 173-180 (2004)

61. Schafer, K. J.; Belfield, K. D.; Yao, S.; Hales, J. M.; Hagan, D. J.; Van Stryland, E. W. "Fluorescent dyes for multiphoton bio-imaging applications" Proc. SPIE - Int. Soc. Opt. Eng., , 5329, p. 201-206 (2004)

62. “Two-photon absorption in direct bandgap semiconductors quantum dots” Lazaro A. Padilha , Jie Fu, G. Nootz, David J. Hagan, Eric W. Van Stryland, D. Buso, A. Martucci, Carlos L. Cesar, Luiz C. Barbosa, and Carlos H. B. Cruz, Proceedings of SPIE -- Volume 6327 (2006)

63. “Nonlinear absorption and refraction process of fluorene-based molecules via picosecond and femtosecond measurements” Raz Gvishi, Lazaro A. Padilha, Jie Fu, David J. Hagan, Eric W. Van Stryland, Sheng Yao and Kevin D. Belfield, Proceedings of SPIE -- Volume 6192 (2006).

64. “High peak power ytterbium-doped fiber amplifiers” W. Torruellas, Y. Chen, B. McIntosh, J. Farroni, K. Tankala, S. Webster, D. Hagan, M. J. Soileau, M. Messerly and J. Dawson, Proceedings of SPIE -- Volume 6102, Fiber Lasers III: Technology, Systems, and Applications, Andrew J. W. Brown, Johan Nilsson, Donald J. Harter, Andreas Tünnermann, Editors, 61020N (2006)

65. Raz Gvishi, Lazaro A. Padilha, Jie Fu, David J. Hagan, Eric W. Van Stryland, Sheng Yao and Kevin D. Belfield, “Nonlinear absorption and refraction process of Fluorene-based molecules via picosecond and femtosecond measurements”, SPIE publication, # 6192-130, Photonics Europe 2006, Strasbourg, France, April 3-7, 2006.

66. “Wideband Protection Filter (WPF) Shield From Laser Damage of Optical Systems”, Ariela Donval, Tali Fisher, Boaz Nemet, Moshe Oron , Scott Webster, David Hagan, Eric Van Stryland, Conference SPIE Defense and Security Europe, session SD102 Electro- optical and Infrared Systems: Technology and Applications, Cardiff, Wales, UK, Sept. 15-18, 2008

67. Jian-Yang Cho, Jie Fu, Lazaro A. Padilha, Stephen Barlow, Eric W. Van Stryland, David J. Hagan, Maximilienne Bishop, and Seth R. Marder, “Synthesis of a Nickel Bis(Dithiolene) Complex With Strong Near-Infrared Two-Photon Absorption”, Mol. Cryst. Liq. Cryst., Vol. 485, pp. 173=[921]–185=[933], 2008.

68. C. Fuentes-Hernandez, L.A. Padilha, D. Owens, S.Y. Tseng, S. Webster, J.Y. Cho, D.J. Hagan, E.W. Van Stryland, S.R. Marder, and B. Kippelen, “Linear and nonlinear optical properties of highly transmissive one-dimensional metal-organic photonic bandgap structures”, Proc. SPIE, Vol. 7049, 70490O (2008); DOI:10.1117/12.797089

69. E. Van Stryland, D. Hagan, S. Webster, and L. Padilha, “Nonlinear spectroscopy: absorption and

refraction” Proc. SPIE 7504, 750415 (2009) L.A. Padilha, G. Nootz, S. Webster, D.J. Hagan, E.W. Van Stryland, L. Levina, V. Sukhovatkin and E.H. Sargent, "Two-photon absorption and multi-exciton generation in lead salt quantum dots" Proc. SPIE 7600, 760008 (2010).

70. T.R. Ensley, D.A. Fishman, L.A. Padilha, C.M. Cirloganu, S. Webster, D. J. Hagan, and E.W. Van Stryland, “Self-Trapping of Supercontinuum Generated by Femtosecond Pulses in a Noble Gas” Ultrafast Phenomena XVII: Proceedings of the 17th International Conference, Majed Chergui (Editor), David Jonas (Editor), Eberhard Riedle (Editor), Robert Schoenlein (Editor), Antoinette Taylor (Editor) (2010).

71. Raz Gvishi, Peng Zhao, Honghua Hu, Galit Strum, Amir Tal, Shmuel Grinvald, Galit Bar, Laura Bekere, Vladimir Lokshin, Vladimir Khodorkovsky, Mark Sigalov, David Hagan, Eric Van Stryland, "Nonlinear solid filter based on photochromism induced by 2-photon absorption in a dye-doped sol-gel" Proc. of SPIE, Vol 9181, Optics and Photonics 2014 meeting, San Diego, California, United States, Session: Light Manipulating Organic Materials and Devices (OP210) 2010

72. L.A. Padilha, G. Nootz, S. Webster, D.J. Hagan, Eric W. Van Stryland, Larissa Levina, Vlad Sukhovatkin, and Edward H. Sargent, "Two-Photon Absorption and Multi-Exciton Generation in Lead Salt Quantum Dots" Proc. SPIE 7600, 760008 (2015)

73. M. Reichert, P. Zhao, H.S. Pattanaik, D.J. Hagan, E.W. Van Stryland , "Nondegenerate two- and three-photon nonlinearities in semiconductors ", Proc. SPIE 9835, Ultrafast Bandgap Photonics, 98350A, May 13, (2016).

74. P. Zhao, M. Reichert, T.R. Ensley, W.M. Shensky, A.G. Mott, D.J. Hagan, E.W. Van Stryland, "Nonlinear refraction dynamics of solvents and gases", Proceedings SPIE 9731, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XV, 97310F, (2016).

75. D.J. Hagan, H.S. Pattanaik, P. Zhao, M. Reichert, and E.W. Van Stryland, "Extremely Nondegenerate Two-photon Processes in Semiconductors", Proceedings of the 5th International Conference on Photonics, Optics, and Laser Technology, pp.65-69, (2017).

76. Sepehr Benis, David J. Hagan, Eric W. Van Stryland, "Cross-propagating Beam-Deflection measurements of third-order nonlinear optical susceptibility" Proc. SPIE, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, edited by Konstantin L. Vodopyanov, Kenneth L. Schepler, Proc. of SPIE Vol. 10088, 100880N 2017. doi: 10.1117/12.2251451, (2017).

E. Presentation of Professional Papers: INVITED, KEYNOTE and PLENARY:

1. "Phase-Conjugation and Optical Logic Operations in InSb", H.A. Mackenzie, D.J. Hagan, and H.A. Al-Attar, Optical Bistability Workshop, Edinburgh, U.K., (1984).

2. "Nonlinear Beam Propagation in Semiconductors", E. W. Van Stryland, D.J. Hagan, M. J. Soileau and Y. Y. Wu, Int. Conf. on Lasers '87, Lake Tahoe, Nevada (Dec 1987).

3. "Nonlinear Optical Properties of Modified Liquids", M. J. Soileau, E. W. Van Stryland, D. J. Hagan, and K. Mansour. International Conference on Nonlinear Optics, Ashford Castle, Ireland (May 1988).

4. "Sensitive, Single Beam n2 Measurements", E.W. Van Stryland, M. Sheik-Bahae, A.A. Said, T.H. Wei, D.J. Hagan, Y.Y. Wu and M.J. Soileau, Interdiciplinary Laser Science Conference ILS-V, Stanford, CA, August (1989).

5. "Single Beam n2 Measurements", E.W. Van Stryland, M. Sheik-Bahae, A.A. Said, T.H. Wei,

6. Hagan, Y.Y. Wu, and M.J. Soileau, Interdisciplinary Laser Science Conference ILS V, Stanford, California,August 28-31, (1989).

7. "Superconducting Striplines and Optical Switching for I.C. Use", D.J. Hagan, Superconductivity Symposium: an Academia Industry Exchange, Tallahassee, FL, (1989).

8. "Dispersion of the Electronic n2 Originating from Two-Photon Absorption in Semiconductors", M. Sheik-bahae, D.J. Hagan and E.W. Van Stryland, OSA Annual Meeting, Orlando, FL, (1989).

9. "Measurement of the Fast Electronic n2 Associated with Two-Photon Absorption in Semiconductors", E.W. Van Stryland, M. Sheik-bahae, D.J. Hagan, T.H. Wei, A.A. Said, J. Young, E. Canto and A. Miller, Lasers 89, New Orleans, December (1989).

10. "Semiconductor Nonlinearities for Optical Limiting", E.W. Van Stryland, D.J. Hagan, M. Sheik-Bahae and M.J. Soileau, IEEE/OSA Meeting on Nonlinear Optics, Kauai, Hawaii, (1990).

11. "Nonlinear Optical Characterization of Organic Materials", M. J. Soileau, T. H. Wei, M. Sheik-Bahae, D. J. Hagan, Martine Sence, and E. W. Van Stryland, III International Topical Meeting on Optics of Liquid Crystals, Optical Properties and Applications of Liquid Crystals and Organic Materials, Cetraro, Italy, (Oct. 1-5, 1990).

12. "Measurements of Third Order Nonlinearities of Nematic Liquid Crystals", P. Palffy-Mulhoray, H.J. Yuan, L. Li, M.A. Lee, J.R. DeSalvo, T.H. Wei, M. Sheik-Bahae, D.J. Hagan and E.W. Van Stryland, III International Topical Meeting on Optics of Liquid Crystals, Optical Properties and Applications of Liquid Crystals and Organic Materials, Cetraro, Italy, (Oct. 1-5, 1990).

13. "Kramers-Kronig Relations for Bound-Carrier (fast) Nonlinearities", D.J. Hagan, M. Sheik-Bahae, D.C. Hutchings, A.A. Said, T.H. Wei, and E.W. Van Stryland, Int. Conf. on Lasers '90, San Diego, CA., (Nov. 1990).

14. "Kramers-Kronig Relations for Nonlinear Optics", D.J. Hagan, Nonlinear Optics 1991, Adelaide, Australia, (1991).

15. "Characterization of Nonlinear Optical Materials", E.W. Van Stryland, M. Sheik-Bahae, G. Stegeman, and D.J. Hagan, American Association for Crystal Growth, Fourth Conference on Crystal Growth, Atlantic City, NJ, (Oct. 2-4, 1991).

16. "Nonlinear Refraction and Absorption Measurements by the Z-Scan", D. J. Hagan, M. Sheik-Bahae, A.A. Said, and E.W. Van Stryland, joint meeting of the Glass and Optical Materials Division and Electronics Division of the American Ceramic Society, Crystal City, VA, (Oct. 20-23, 1991).

17. "Wavelength Dependence of Nonlinear Absorption and Refraction in Solids", M.J. Soileau, M. Sheik-Bahae, D.C. Hutchings, D.J. Hagan and E.W. Van Stryland, XIV International Conference on Coherent and Nonlinear Optics, Leningrad, (1991).

18. "New Measurement Method for Nonlinearities in Semiconductors", E.W. Van Stryland, A.A. Said, M. Sheik-Bahae, D.J. Hagan, E.J. Canto-Said, Y.Y. Wu and T.H. Wei, ISLA-90, (Vilnius, Germany, 1991)

19. "Measurement of Nonlinear absorption and Refraction of Light by Matter", D.J. Hagan, M. Sheik-Bahae, M.J. Soileau and E.W. Van Stryland, American Association of Physics Teachers, Winter Meeting, (Orlando FL, Jan 1992).

20. "Z-Scans and Nonlinear Kramers-Kronig Relations" E.W. Van Stryland, M. Sheik-Bahae, D.C. Hutchings and D.J. Hagan", Invited Lecture at the International School on Nonlinear Photonics and Optical Physics, Capri, Italy (June 1992).

21. "Cascading of χ(2) for χ (3) Nonlinearities", E.W. Van Stryland. G.I. Stegeman, R.DeSalvo, D.J. Hagan and M. Sheik-Bahae, Nonlinear Optics 2nd Topical Meeting, Maui, Hawaii, (1992).

22. "Characterization of Nonlinear Absorption and Refraction in Advanced Materials", E.W. Van Stryland, M. Sheik-Bahae, A.A. Said* and D.J. Hagan. SPIE - OE-LASE, Los Angeles, (Jan,1993).

23. “Phase Shifting and Switching Via Cascaded Nonlinearities”, E.W. Van Stryland, G. Stegeman, M. Sheik-Bahae, J.D. DeSalvo, and D.J. Hagan, 23rd Winter Colloquium on Quantum Electronics, Snowbird, Utah Jan. 5-8, (1993).

24. “Characterization of Nonlinear Absorption and Nonlinear Refraction in Advanced Optical materials”, E.W. Van Stryland, M. Sheik-Bahae, D.J. Hagan, OE-LASE ‘93, Los Angeles, CA, Jan. 18-22, (1993).

25. “Z-Scan Characterization of Nonlinear Materials”, E.W. Van Stryland, M. Sheik-Bahae, A.A. Said, T. Xia, J. Wang and D.J. Hagan, Quantum Electronics and Laser Science Conference (QELS), Baltimore, MD, May 2-7 (1993).

26. “Ultra-Sensitive measurement Technique for Thin-Film Nonlinearities”, E.W. Van Stryland, M. Sheik-Bahae, T. Xia, C. Wamsley**, Z. Wang*, A.A. Said*, and D.J. Hagan, POLYMEX-93, International Symposium on Polymers, Cancun, Mexico, Nov. 1-5, 1993.

27. “Modeling of Z-Scans in the Internal Self-Action Regime”, T. Xia*, D.J. Hagan, M. Sheik-Bahae, M.J. Soileau, and E.W. Van Stryland, The Volga laser Tour conference, Saratov to Moscow, Russia, June 25-July 4, (1993).

28. “Characterization of Nonlinear Optical Materials”, E.W. Van Stryland, M. Sheik-Bahae, A.A. Said, and D.J. Hagan, 1993 Boulder Damage Conference, 25th Anniversary, Boulder, CO., Nov. (1993).

29. Optimization of Reverse Saturable Absorber Limiters: Materials Requirements and Design Considerations”, D.J. Hagan, T. Xia, A. Dogariu, A.A. Said, and E.W. Van Stryland, 1994 Fall meeting of the Materials Research Society, Boston, MA, (1994).

30. “2D Solitary waves in a quadratic medium”, W.E. Torruellas, Z. Wang, D.J. Hagan, E.W. Van Stryland G. I. Stegeman and L. Torner, QELS, Baltimore, (June 1995)

31. “SAIL” - System for Autonomous Instructional Laboratories”, M. Bass, A. Vali, D. J. Hagan and J. J. Brennan, American Association of Physics Teachers, Reno, Nevada (Jan, 1996).

32. “Device Design and Materials Characterization for Passive Optical Limiters,” Eric W. Van Stryland, David J. Hagan, Salah Khodja and Sidney Yang, MRS Spring Meeting, Symposium on Optical Limiting, San Francisco, (1997)

33. “Measurement of Sub femtosecond response times” David J. Hagan, 2nd Cork Workshop on Fundamentals, Modeling and Control of Semiconductor Lasers, University College, Cork, Ireland (July 1997)

34. “Optical Limiting and the Potential Role of Organic Materials”, Eric Van Stryland, Arthur Dogariu, Jin Hong Lim, David J. Hagan and Olga Przhonska, Organic Thin Films for Photonics Applications Meeting, Long Beach, CA, (1997).

35. "χ(3)'s: Their Characterization and Understanding", E. W. Van Stryland, R. Negres, E. Miesak, D. Hagan and M. Sheik-Bahae, Nonlinear Optics '98, Materials, Fundamentals and Applications Topical Meeting, Kauai, HI, Aug. 10-14, 1998.

36. "Passive Optical Limiting: Where are we?", E. Van Stryland, M.J. Soileau and D.J. Hagan, First international Conference on Optical Power Limiting, Cannes, France, June 28- July 1, 1998.

37. Invited: “Cascaded Optical Limiters and Modeling”, Eric W. Van Stryland, Sidney S.Yang, Florencio E. Hernández, Vladislav Dubikovsky, W. Shensky III, David J. Hagan, Second International Symposium on Optical Power Limiting, ISOPL 2000, Venice, Italy, July 2-5, 2000.

38. "Excited state absorption and reorientation in polymethine and squarylium dyes." David J. Hagan, Olga V. Przhonska, Raluca Negres, Eric W. Van Stryland, Evgueni Novikov, Mikhail V. Bondar, Yuriy L. Slominsky, Alexei D. Kachkovski, Novel Optical Materials & Applications, Cetraro, Italy May 2001.

39. "Nonlinear Spectroscopy for Optical Limiter Development", E. W. Van Stryland, J. Hales, F. Hernandez, V. Dubikovsky, W. Shensky and D. J. Hagan, Sixth International Conference on Organic Nonlinear Optics (ICONO 6), Tucson, AZ, December 2001.

40. Invited: "Wavelength independent, high dynamic range optical limiter", E. Hernandez, et. al., SPIE'01, San Diego, California, Aug., 2001.

41. Invited: F. E. Hernández, W. Shensky III, Ion Cohanoschi, E. W. Van Stryand, D. J. Hagan, "Wavelength independent, high dynamic range optical limiter", SPIE'01 (Invited talk), San Diego, USA.

42. Invited: U. Gubler, C. Bosshard, P. Günter, R. Martin, F. Diederich, R. A. Negres, D. J. Hagan, "White-light continuum spectroscopy to determine third-order nonlinear optical properties", SPIE'01 (Invited talk), San Diego, USA.

43. Invited: D. J. Hagan, O. V. Przhonska, R. A. Negres, E. W. Van Stryland, E. V. Novikov, M. V. Bondar, Y. L. Slominsky, A. D. Kachkovsky, "Nature of excited-state absorption in organic molecules”, SPIE'01 (Invited talk), San Diego, 2001

44. Invited: “Nonlinear Absorption Spectroscopy”, E. Van Stryland, D. Hagan, R. Negres, J. Hales, American Ceramic Society, Pac-Rim 4, International Conference on Advanced Ceramics and Glasses, Maui, Hawaii, Nov. 2001.

45. Invited: “Nonlinear Optical Materials”, David. J. Hagan, Tutorial Review paper, OSA Annual Meeting, Orlando, FL, Sept 2002.

46. Invited: “Broadband Nonlinear Absorption Spectroscopy”, for Optical Limiter Development”, Eric Van Stryland, Joel Hales, Raluca Negres, Florencio Hernández, Vladislav Dubikovsky, William Shensky III, David Hagan, SPIE annual meeting, (Seattle, WA August 2002)

47. Invited: “Femtosecond Continuum Measurement of Nonlinear Absorption Spectra”, E. Van Stryland, David Hagan, 6th Annual Southeast Ultrafast Conference, Univ. of Florida, Gainesville, FL Jan. 17-18, 2003.

48. Invited: “Two-photon absorption properties of commercial photoinitiators”, J. M. Hales, K. D. Belfield, K. J. Schafer, M. Balu, E. W. Van Stryland, D. J. Hagan, Proceedings of SPIE Vol. 5211, [5211-18], Nonlinear Optical Transmission and Multiphoton Processes in Organics, San Diego, CA Aug. 2003.

49. Invited: “Optimization of Two-Photon Absorption and Excited State Absorption in Organic Molecules”, D. J. Hagan, J. Hales, K. J. Schafer, A. M. Morales, K. D. Belfield and E. W. Van Stryland, 5th Mediterranean Workshop on Novel Materials and Applications (NOMA), Cetraro, Italy, June 2003

50. Invited: “Optics and Photonics Education in Central Florida” David J. Hagan. Education and Training in Optics and Photonics, (ETOP), Tucson, September 2003

51. Invited: “Optimization of Two-Photon Absorption and Excited State Absorption in Organic Molecules” D. J. Hagan, J. Hales, K. J. Schafer, A. M. Morales, O. Przhonska, R Lepkowicz, K. D. Belfield and E. W. Van Stryland, ISOPL 3, Sedona, AZ, October, 2003

52. Invited: “Cascaded Optical Limiters” E. W. Van Stryland, W. Shensky III, I. Cohanoschi, F. E. Hernandez, A. Sevian, , and D. J. Hagan, ISOPL 3, Sedona, AZ, October, 2003

53. PLENARY: Crystals for Nonlinear Optics, David J. Hagan, American Crystal Growers Society Annual Conference, Keystone, CO, July 2003.

54. Invited: “Nondegenerate two-photon and excited state absorption spectroscopy of organics”, E. Van Stryland, J. Hales, R. Lepkowicz, D. Hagan, J.-L. Bredas, ILS, Tucson, AZ, 2003.

55. Invited: “Optical limiting for Short Pulses: Two Photon Absorption”, David Hagan and Eric Van Stryland, Conference on Ultrashort Pulses for High Power Lasers, Boulder CO 2003.

56. Invited: “Nondegenerate two-photon and excited state absorption spectroscopy of organics”, E. Van Stryland, J. Hales, R. Lepkowicz, D. Hagan, J.-L. Bredas, ILS, Tucson, AZ, 2003.

57. Invited: “Two-photon absorption properties of commercial photoinitiators”, J. M. Hales, K. D. Belfield, K. J. Schafer, M. Balu, E. W. Van Stryland, D. J. Hagan, Proceedings of SPIE Vol. 5211, [5211-18], Nonlinear Optical Transmission and Multiphoton Processes in Organics, San Diego, CA Aug. 2003.

58. Invited: “Optical limiting for Short Pulses: Two Photon Absorption”, David Hagan and Eric Van Stryland, Conference on Ultrashort Pulses for High Power Lasers, Boulder CO 2003.

59. PLENARY: “Nonlinear Optical Spectroscopy”, E. W. Van Stryland, J. Hales, K. Belfield and D. J. Hagan, Optical Society of Korea Annual meeting Kwanju, Korea, Feb. (2004)

60. Invited: “Nondegenerate Two-Photon Absorption Spectroscopy”, E. W. Van Stryland, J. Hales, K. Belfield and D. J. Hagan, PQE, (Snowbird, Utah, 2004.)

61. Invited: “Two-Photon Absorption and Excited State Absorption in Organic Molecules”, D. J. Hagan, J. Hales, R. Lepkowicz, O Przhonska, K. D. Belfield and E. W. Van Stryland, Annual Meeting of American Ceramic Society, (Indianapolis, 2004).

62. Invited “Nonlinear Spectroscopy of Organic Molecules”, Eric Van Stryland, Joel Hales, Mihaela Balu, David Hagan, 5th Iberoamerican Meeting On Optics and 8th Latinoamerican Meeting on Optics, Lasers and Their Applications: RIAO/OPTILAS 2004, Margarita, Venezuela, Oct. 4-7, 2004.

63. Invited “Nonlinear Spectroscopy”, Eric Van Stryland, D. Hagan, Jie Fu, M. Balu, J. Hales, K. D. Belfield, K. J. Schaefer, R.S. Lepkowicz, C.M. Cirloganu, and O.V. Przhonska, Sociedad Mexicana de Física XLVII Congreso Nacional de Física, Hermosillo, Mexico, Oct. 25-29, 2004.

64. Invited: “Two-Photon Absorption and Excited State Absorption in Organic Molecules”, D. J. Hagan, J. Hales, R. Lepkowicz, O Przhonska, K. D. Belfield and E. W. Van Stryland, Annual Meeting of American Ceramic Society, (Indianapolis, June, 2004).

65. Plenary: “Recent Advances in Third-Order Nonlinear Optical Materials”, Seth R. Marder, Stephen Barlow, Luca Beverin, Jean-Luc Brédas, Sung-Jae Chung, Jie Fu, David J. Hagan, Sei-Hum Jang, Amalia Leclercq, Alex Jen, Seth R. Marder, Peter Pacher, Joseph W. Perry, Mariacristin Rumi, Eric W. Van Stryland, Natalie Thompson, Neil Tucker, Shijun Zheng, Egbert Zojer, 8th International Conference on Frontiers of Polymers., Cancun, Mexico, April, 2005.

66. Invited: Keynote Address: “Advances in Third-Order NLO Materials”, S. Marder, S. Chung, S. Zhang, T. Odani, J. Cho, S. Barlow, E. Van Stryland, D. Hagan, J. Fu, J. Hales, M. Rumi, A.

Biesso, S. Chi, J.W. Perry, SPIE Photonics West, Conference 6117, Organic Photonic Materials and Devices VIII, Jan. 2006.

67. Invited: “Nonlinear Optical Properties of Semiconductor Quantum Dots”, Lazaro A. Padilha, Jie Fu, Gero Nootz, David J. Hagan, and Eric W. Van Stryland, X National Meeting on Optics & I Carribean and Andean Conference on Optics, Columbia, Sept. 2006.

68. Invited: “Nonlinear Spectroscopy in Semiconductors Quantum Dots”, Eric Van Stryland, Lazaro Padilha, Jie Fu, Mihaela Balu, David Hagan, Carlos L. Cesar, Luiz C. Barbosa, Carlos H. B. Cruz, 12th Conference on Laser Optics, St Petersburg, Russia, June 26-30, 2006.

69. Invited: “Pathways to Strong Two-Photon Absorption in -Conjugated Organic Molecules”, David J. Hagan, Eric W. Van Stryland, Jie Fu, Shijun Zheng, Luca Beverina, Toru Odani, Sung-Jae Chung, Stephen Barlow, Olga V. Przhonska, Alexei D. Kachkovski, Yuriy L. Slominsky and Seth Marder, ISOPL, ??? 2006.

70. Invited: “Broadband Z-scan characterization of NLO materials using high energy, high quality, supercontinuum generated by filamentation in krypton”, Mihaela Balu, David J. Hagan, Eric W. Van Stryland, International Symposium on Materials and Devices for Nonlinear Optics (ISOPL), Dingle, Ireland, 2006.

71. Invited: “Pathways to large Two-Photon Absorption in Pi-conjugated Organic Molecules”, David J. Hagan, Eric W. Van Stryland, Jie Fu, Shijun Zheng, Luca Beverina, Olga V. Przhonska and Seth Marder International Symposium on Materials and Devices for Nonlinear Optics (ISOPL), Dingle, Ireland, 2006.

72. Invited: “Measuring the Spectral Dependence of Nonlinear Absorption and Refraction”, E. Van Stryland, D. Hagan, M. Balu, J. Fu, C. Cirloganu, S. Webster, Annual meeting of the American Chemical Society, Polmer Branch, San Francisco, Sept. 2006.

73. “Characterization of NLO properties of Organic Molecules and Quantum dots by White-Light Continuum Z-scan” L.A. Padilha, G. Nootz, M. Balu, D. J. Hagan, E. W. Van Stryland, Conference on Novel Optical Materials and Applications, Cetraro, Italy, June 2007.

74. Invited: Eric W. Van Stryland, Mihaela Balu, David J. Hagan, Gero Nootz, Scott Webster, Lazaro Padilha, Claudio Cirloganu, Peter Olzsak, Seth Marder, Joe Perry, “White-Light Continuum Z-scan Nonlinear Optical Spectroscopy”, PQE XXXVII (Physics of Quantum Electronics conference), Snowbird, Utah, Jan. 6-10, 2008.

75. Invited: E.W. Van Stryland, M. Balu, D.J. Hagan, G. Nootz, S. Webster, O. Przhonska, S. Marder, S. Barlow, S. Zheng, and K. Belfield, “White light continuum Z-scan for nonlinear optical spectroscopy” ICONO10/ICOPE 2008, Session M4 in Chi(3) and Nonlinear Absorption, Santa Fe, NM (2008).

76. Invited: D J. Hagan, S. Webster, L. A. Padilha, O. V. Przhonska, S. R. Marder and Eric W. Van Stryland, “Characterization of Nonlinear Absorption and Refraction in Organic Molecules", ICOPE 2009/ICONO 2009 (International Conference on Organic Photonics and Electronics and the 11th International Conference on Organic Nonlinear Optics), Beijing China, Sept. 20-25, 2009.

77. Invited: Seth R. Marder, Stephen Barlow, Luca Beverina, Jean-Luc Brédas, David J. Hagan, Joel M. Hales, Jon Matichak, Lazaro Padilha, Joseph W. Perry, Yanrong Shi, Eric W. Van Stryland, Scott Webster, Shijun Zheng, “Materials for Third-Order Nonlinear Optics”Optical Probes conference, Beijing, China, June, 2009.

78. Invited: Eric Van Stryland, David Hagan, Olga Przhonska, Seth Marder, Scott Webster, Lazaro Padilha, “Nonlinear Absorption Spectroscopy of Organic Dyes”, keynote lecture at the 5th

International Symposium on Materials and Devices for Nonlinear Optics (ISOPL5), Ile de Porquerolles, France (June 2009).

79. Invited: C. Fuentes-Hernandez, J. Hsu, D.T. Owens, L.A. Padilha, J.M. Hales, S. Webster, S.R. Marder, J.W. Perry, D.J. Hagan, E.W. Van Stryland, and B. Kippelen, "Metal-dielectric multilayer structures and their applications in nonlinear optics" 14th International conference on Laser Optics, St. Petersburg, Russia, Jun. 28 – Jul. 2, (2010).

80. Invited: Lazaro A. Padilha, Gero Nootz, Scott Webster, David J. Hagan, Eric W. Van Stryland, Larissa Levina, Vlad Sukhovatkin, and Edward H. Sargent, "Size-Dependence of Two-Photon Absorption and Multi-Exciton Generation in Lead Salt Quantum Dots" 14th International conference on Laser Optics, St. Petersburg, Russia, Jun. 28 – Jul. 2, (2010).

81. Invited: E. Van Stryland, C. Cirloganu, D. Fishman, S. Webster, L.A. Padilha, and D.Hagan, “Extreme Nondegenerate Two-Photon Absorption in Semiconductors” 41st Winter Colloquium on the Physics of Quantum Electronics (PQE-2011), (2011).

82. Keynote: E.W. Van Stryland, D. Fishman, T. Ensley, S. Webster, and D. J. Hagan, “Extreme Nondegenerate Two-Photon Absorption and Spectroscopy” The 14th Annual Southeast Ultrafast Conference (SEUFC) (2011).

83. Invited: E. Van Stryland, C. Cirloganu, D. Fishman, S. Webster, L. Padilha, D. Hagan, “Large two-photon absorption with extremely nondegenerate photons”, CLEO, Baltimore, MD, (2011).

84. Invited: E.W. Van Stryland, C.M. Cirloganu, L.A. Padilha, S. Webster, and D.J. Hagan, “Extreme Nondegenerate Two-Photon Absorption” General Congress of the International Commission for Optics (ICO-22), (2011).

85. Keynote: E.W. Van Stryland, T. Ensley, H. Hu, M. Seidel, D. Peceli, D. Fishman, S. Webster, and D.J. Hagan, “Nonlinear Spectroscopy” 12th International Conference on Organic Nonlinear Optics and the International Conference on Organic Photonics and Electronics (ICONO12/ICOPE) (2011).

86. Keynote: David J. Hagan, Trenton Ensley, Honghua Hu, Marcus Seidel, Davorin Peceli, Dmitry Fishman, Scott Webster, and Eric W. Van Stryland, “Nonlinear Spectroscopy of Organics (and other materials)”, INWPB, St. Germain au Mont D’or, France, October 27 (2011)

87. Invited: David Hagan, Eric Van Stryland, Scott Webster, Dmitry Fishman, Honghua Hu, Trenton Ensley and Markus Seidel, “Degenerate and Nondegenerate Nonlinear Spectroscopy.”, MRS Fall Meeting, Symposium K, (Boston, MA, Nov 2011)

88. Invited: Eric Van Stryland, Himansu S. Pattanaik, Dmitry A. Fishman, Scott Webster, David J. Hagan, "Nondegenerate 2-Photon Absorption Spectroscopy and Detection", NLO50,50 Years of Nonlinear Optics International Symposium, ICFO, Barcelona, Spain, Oct. 7-10, 2012.

89. Invited: E.W. Van Stryland, D.J. Hagan, "Separation of electronic and nuclear nonlinearities and modeling of organic materials" ,Photonics Middle East Conference, Doha, Qatar Dec. 13-16, 2014

90. Keynote: E. Van Stryland, T. Ensley, M. Reichert, D. Hagan, "Experimental tool for nonlinear spectroscopy: absorption and refraction", SPIE Laser Damage 2014, NIST, Boulder, CO, Sept 14-17,2014

91. Invited: David J Hagan, Honghua Hu, Manuel R Ferdinandus, Trenton R Ensley, Matthew Reichert, Eric W Van Stryland, "New Methods for Measuring Nonlinear Refraction: Beam Deflection and Dual-Arm Z-Scan" MRS Spring meeting, paper JJ7.02, San Francisco, April 2014.

92. Invited: Eric W. Van Stryland, Honghua Hu, Trenton R. Ensley, Matthew C. Reichert, Manuel R. Ferdinandus, David J. Hagan, "Nonlinear absorption and refraction spectroscopic tools" SPIE Optics & Photonics, 9181, San Diego, CA, Aug. 20-21, 2014.

93. Invited: E.W. Van Stryland, M. Reichert, M.R. Ferdinandus, H. Hu, P. Zhao, J.M. Reed, T.R. Ensley, & D.J. Hagan "Spectroscopic Tools for Nonlinear Absorption and Refraction" International Commission on Optics, ICO, Santiago de Compostella, Spain, August 2014.

94. David J. Hagan "Nonlinear refraction and absorption: Mechanisms, Characterization and Applications" Seminar, National Cheng-Kung University, Tainan, November 19, 2015

95. David J Hagan, "Nonlinear refraction and absorption: Mechanisms, Characterization and Applications" OSA Student Chapter Seminar National Chiao Tung University, Tainan Campus November 20, 2015

96. Invited: Seth Marder, Stephen Barlow, Jean-Luc Bredas, San-Hui Chi, David J. Hagan, Joel M. Hales, Yesudas Kada, Hsin-Chieh Li, Jon Matichak, Shino Ohira, Lazaro Padilha, Joseph W. Perry, Eric W. Van Stryland and Scott Webster; “Development of Materials for Third-Order Nonlinear Optics”, MRS Fall meeting, Symposium K, Materials for High Power Photonics, (Boston, Nov. 28-Dec. 2, 2011).

97. Invited: D.J. Hagan, H. Pattanaik, M. Reichert, P. Zhao, E. Van Stryland, "Extremely nondegenerate nonlinear optics." 5th OASIS International Conference and Exhibition on Optics and Electro-Optics, Tel Aviv, Israel, Invited talk, (March 3-4 2015)

98. Invited: D.J. Hagan, E.W. Van Stryland, "Characterization and modeling of nonlinear refraction and absorption" XIV Brazilian MRS, Rio De Janeiro September 27 - October 1, 2015

99. Keynote: David J. Hagan, Trenton R. Ensley, Matthew Reichert, Eric W. Van Stryland, "Characterization of nonlinear refraction and absorption" SPIE Pacific Rim Laser Damage Conference, Shanghai May 2015

100. Keynote: Hagan, D. J., Ensley, T. R., Reichert, M, Ferdinandus, M, R, Hu, H. and Van Stryland, E. W., "New methods for characterizing the nonlinear optical properties of organic materials" (Keynote Presentation) 13th International Conference on Frontiers of Polymers and Advanced Materials, 13th ICFAM, Marrakesh, Morocco, April 2015.

101. Invited: D.J. Hagan, E.W. Van Stryland,"Nonlinear materials characterization and modeling" US-Israel Emerging Technology, Boston, MA, Dec. 2-3,2015

102. Invited: H. Hu, T.R. Ensley, M. Reichert, M.R. Ferdinandus, D. Peceli, O.V. Przhonska, S.R. Marder, A. K-Y Jen, J.M. Hales, J.W. Perry, D.J. Hagan, & E.W. Van Stryland,"Optimization of the Electronic Third-order Nonlinearity of Cyanine-like Molecules for All Optical Switching" ,Photonics West, San Francisco, January, 2015

103. Keynote Presentation: D.J. Hagan and E.W. Van Stryland, "Electronic and Nuclear Optical Nonlinearities in Organic Materials and Solvents ", 14th International Conference on Frontiers of Polymers and Advanced Materials, Dajeon, South Korea, 2016, Paper 1A1-1, (2016).

104. Invited: D.J. Hagan, M. Reichert, P. Zhao and E.W. Van Stryland, "Measurements of the Second Hyperpolarizability and Nuclear Rotational Response of Liquids and Gases", 17th International Conference, Laser Optics 2016, St. Petersburg, Russia, June, 2016. Paper WeR4-01 (2016).

105. Invited: D.J. Hagan, P. Zhao, T. Ensley, M. Reichert and E.W. Van Stryland, "The nonlinear refraction temporal response function of solvents and gases", Southeastern Ultrafast Conference, 2016, North Carolina State University, Jan 14-15, (2016).

106. Invited: E.W. Van Stryland, and D.J. Hagan, "Extremely Nondegenerate Nonlinear Responses of Semiconductors ", LAOP, Medellin, Columbia, August 24, (2016).

107. Keynote presentation: D.J. Hagan, T.R. Ensley, M. Reichert, M.R. Ferdinandus, H. Hu, and E.W. Van Stryland, "New methods for characterizing the nonlinear optical properties of organic materials", 13th International Conference on Frontiers of Polymers and Advanced Materials (ICFPAM), Marrakesh, Morocco, April, (2016).

108. Keynote Presentation: P. Zhao, M. Reichert, T.R. Ensley, W.M. Shensky III, A.G. Mott, D.J. Hagan, and E.W. Van Stryland, "Nonlinear refraction dynamics of solvents and gases", SPIE Photonics West, LASE LA106, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XV, Paper 9731-46, San Francisco, February 13-18, (2016).

109. Plenary Presentation: D.J. Hagan, "Measuring the impulse response function in nonlinear optics", OSA Latin American Optics & Photonics Conference, Medellin, Colombia, 22-26 August 2016, Plenary Session 2, Tuesday August 23, (2016).

110. Plenary Presentation: E.W. Van Stryland, and D.J. Hagan, "Extremely Nondegenerate Enhancement of Third-Order Nonlinearities in Semiconductors", Photonics 2016, Kanpur India, Dec. 4-8, (2016).

111. David J. Hagan, Matthew Reichert, Peng Zhao, Himansu S. Pattanaik, and Eric W. Van Stryland, "Nondegenerate nonlinear refraction, absorption, and gain in semiconductors (Keynote Presentation)", SPIE Defense + Commercial Sensing 2017, Anaheim, CA, April 9-13, 2017, Paper 10193

112. David J. Hagan and Eric W. Van Stryland, "Time-domain nonlinear refraction - toward tailorable nonlinear optical responses", IWNBP 2017: 4th International Workshop on Nano and Bio-Photonics, Ardeche, France, 2017

113. E.W. Van Stryland and D. Hagan, "Nonlinear beam deflection for material response characterization" Stegeman Memorial Conference, UCF, Orlando, FL March 12-13 (2018)

114. D. J. Hagan and E. W. Van Stryland, "Ultrafast dynamics of nonlinear refraction," in Latin America Optics and Photonics Conference, OSA Technical Digest (Optical Society of America, 2018), paper W2E.1.

115. Sepehr Benis, Eric W. Van Stryland, David J. Hagan, “Dynamics and spectral dependence of ultrafast optical nonlinearities in doped semiconductors at Epsilon-Near-Zero” PIERS 2018, Toyama, Japan (July 2018)

116. Sepehr Benis, Eric W. Van Stryland, David J. Hagan, “Ultrafast dynamics and spectral dependence of optical nonlinearities in doped semiconductors at epsilon-near-zero”, Proc. SPIE 10719, Metamaterials, Metadevices, and Metasystems 2018, 1071910 (17 September 2018); doi.org/10.1117/12.2321983

117. Sepehr Benis, Natalia Munera, Eric W. Van Stryland, and David J. Hagan, “Giant, ultrafast nonlinear refraction in Indium-Tin-Oxide at epsilon-near-zero” (Keynote presentation) International Conference on the Frontiers of Polymers and Advanced Materials (ICFPAM) 2019, Penang, Malaysia, (17-21 June, 2019)

118. Sepehr Benis, Natalia Munera, Eric W. Van Stryland, and David J. Hagan, “Z-scan and beam-deflection measurements of Indium-Tin-Oxide at epsilon-near-zero” Conference on Novel Optical Materials and Applications (NOMA), Cetraro, Italy, (July 2019)

REFEREED:

1. "Degenerate Four-wave Mixing in InSb at 77K", C.T. Seaton, H.A. Mackenzie, D.J. Hagan, and S.D. Smith, Conference on Lasers and Electro-Optics, Baltimore, (1983).

2. "Phase Conjugation by Degenerate Four-Wave Mixing in InSb", D.J. Hagan, C.T. Seaton, H.A. Mackenzie, Sixth National Quantum Electronics Conference, Brighton, U.K., (1983).

3. "Nonlinear Enhancement of the Sagnac Effect", W.J. Firth, E.M. Wright, H.A. Mackenzie, and D.J. Hagan, Sixth National Quantum Electronics Conference, Brighton, U.K., (1983).

4. "Phase Conjugation in InSb with a cw CO Laser", H.A. Al-Attar, D.J. Hagan, H.A. Mackenzie and C.T. Seaton, Conference on Lasers and Electro-Optics, Anaheim, (1984).

5. "Transverse Switching Waves and Crosstalk of Bistable Elements", I. Galbraith, W.J. Firth, D.J. Hagan, H.A. Mackenzie, J.J.E. Reid, A.C. Walker, J. Young, and S.D. Smith, Seventh National Quantum Electronics Conference, Malvern, U.K., (1985).

6. "Measurement of Switching Time Delay Between Adjacent Bistable Optical Switching Elements in InSb", J. Young, H.A. Mackenzie, A.C. Walker, and. D.J. Hagan, Conference on Lasers and Electro-Optics, San Francisco, (1986).

7. "Self-Protecting Solid State Optical Limiter", M.J. Soileau, D.J. Hagan, and E.W. Van Stryland, Conference on Lasers and Electro-Optics (CLEO), San Francisco, (1986).

8. "Characterization of Semiconductor Optical Power Limiting Devices", D.J. Hagan, M.J. Soileau, Y.Y. Wu, and E.W. Van Stryland, Conference on Lasers and Electro-Optics (CLEO), Baltimore, MD., (1987).

9. "Nonlinear Absorption-Induced Transmission Changes in ZnSe Interference Filters", D.J. Hagan, Y.Y. Wu, M.J. Soileau, E.W. Van Stryland, Y.T. Chow, and B.S. Wherrett, Fifteenth International Conference on Quantum Electronics, Baltimore, (1987).

10. "Temporal and Spatial Distribution of Light from a Monolithic Limiter", M.J. Soileau, D.J. Hagan, E.W. Van Stryland, Joint U.S.-U.K Conference on Sensor Protection, Malvern, England, (1987).

11. "Repetition Rate Dependence of the Nonlinear Response of Suspended Particles", M.J. Soileau, K. Mansour, E.W. Van Stryland, E. Canto, and D.J. Hagan, Joint U.S.-U.K. Conference on Sensor Protection, Malvern, England, (1987).

12. "Optical Damage Protector Based on Self-Defocusing in Semiconductors:, E.W. Van Stryland, M.J. Soileau, D.J. Hagan, and Y.Y. Wu, SPIE O-E/LASE '88 Symposium on Lasers and Optics, Los Angeles, CA, (1988).

14. "Picosecond Degenerate Four-Wave Mixing Studies in ZnSe", D.J. Hagan, E. Canto, E. Miesak, M.J. Soileau, and E.W. Van Stryland, Conference on Lasers and Electro-Optics (CLEO), Anaheim CA, (1988).

15. "Two-Photon Absorption and Free-Carrier Absorption in Semiconductor Doped Glasses", E. Canto, E. Miesak, D.J. Hagan, M.J. Soileau, and E.W. Van Stryland, Conference on Lasers and Electro-Optics (CLEO), Anaheim CA, (1988).

16. "Analysis of Semiconductor Based Optical Limiters", E.W. Van Stryland, Y.Y. Wu, D.J. Hagan, and M.J. Soileau, International Quantum Electronics Conference (IQEC), Tokyo, Japan, (1988).

17. "Optical Limiting with Semiconductors", E.W. Van Stryland, Y.Y. Wu, D.J. Hagan, M.J. Soileau, and K. Mansour, Topical Meeting on Laser Materials and Laser Spectroscopy, Shanghai, China, (July 25-27, 1988).

18. "A Simple and Sensitive Technique for Determining Refractive Nonlinearities", M. Sheik-Bahae, A.A. Said, Y.Y. Wu, T.H. Wei, D.J. Hagan, and E.W. Van Stryland, Conference on Lasers and Electro-Optics (CLEO), Baltimore, MD, (1989).

19. "Sensitive n2 Measurements Using a Single Beam", M. Sheik-Bahae, A.A. Said, T.H. Wei, D.J. Hagan, E.W. Van Stryland, and M.J. Soileau, 1989 Boulder Damage Conference, Boulder, CO, (1989).

20. "Relation Between n2 and Two-Photon Absorption", M. Sheik-Bahae, D.J. Hagan, A. Miller, and E.W. Van Stryland, 1989 Boulder Damage Conference, Boulder, CO, (1989).

21. "Nonlinear Optical Characterization of CdTe as Applied to Limiting at 1.06 Microns", D.J. Hagan, J.Young. M. Sheik-Bahae, M.J. Soileau, and E.W. Van Stryland, Conference on Lasers and Electro-Optics (CLEO), Baltimore, MD, (1989).

22. "Sensitive n2 Measurement and Relation of n2 to Two-Photon Absorption", E.W. Van Stryland, M. Sheik-Bahae, D.J. Hagan, Gordon Conference on Nonlinear Optics and Lasers, (July 1989).

23. "Passive Broadband High Dynamic-Range Semiconductor Limiters", D.J. Hagan, E.W. Van Stryland, Jim Young, T.H. Wei, M. Sheik-Bahae, A.A. Said, K. Mansour, and M.J. Soileau, SPIE's conference 1105 Technical Symposium, Orlando, Florida (1989).

24. "Z-Scan Measurements of High Order Optical Nonlinearities in Semiconductors", A.A. Said, M. Sheik-Bahae, T.H. Wei, J. Young, M. Junnarkar, D.J. Hagan and E.W. Van Stryland, CLEO, Anaheim, CA, (1990).

25. "Hybrid Optical Limiters Utilizing Metallophthalocyanine Based Dyes and Il-IV Semiconductors", T.H. Wei, E.W. Van Stryland, D.J. Hagan, J.W. Perry, L.R. Khundkar, Dr.R. Coulter and M.E. Kenney, CLEO, Anaheim, CA, (1990).

26. "Anomalous Dispersion of the Electronic Kerr Effect", D.J. Hagan, Y.Y. Wu, E. Canto, M. Sheik-Bahae, A.A. Said, J. Young, T.H. Wei, M. Junnarkar, and E.W. Van Stryland, Seventh Topical Meeting on Ultrafast Phenomena, Monterey, CA, (May 14-17, 1990).

27. "Excited State Absorption and Optical Nonlinearities of Metallophalocyanines and Naphthalocyanines in Solution", J.W. Perry, L.R. Khundkar, D.R. Coulter, T.H. Wei, E.W. Van Stryland and D.J. Hagan, IEEE/OSA Meeting on Nonlinear Optics, Kauai, Hawaii, (1990).

28. "Excited State Absorption and Optical Limiting in Solutions of Metallophtalocyanines and Naphthalocyanines in Solution", J.W. Perry, L.R. Khundkar, D.T. Coulter, T.H. Wei, E.W. Van Stryland and D.J. Hagan, conference in Organic Materials for Nonlinear Optics II, Oxford, U.K., Sept 4-6, 1990).

29. "Excited State Absorption and Optical Limiting in Solutions of Metallophtalocyanines", J.W. Perry, L.R. Khundkar, D.R. Coulter, T.H. Wei, E.W. Van Stryland and D.J. Hagan, NATO Workshop on "Organic Materials for Nonlinear Optics and Photonics", La Rochelle, France, (Aug. 26-31, 1990).

30. "Dispersion of n2 in Solids:, M. Sheik-Bahae, D.C. Hutchings, D.J. Hagan, M.J. Soileau, and E.W Van Stryland, 1990 Boulder Damage Conference, Boulder, Co., (1990).

31. "Scaling Laws for Ultrafast All Optical Switching", D.J. Hagan, M. Sheik-Bahae, D.C. Hutchings, and E.W. Van Stryland, Annual Meeting of LEOS'90, Boston, Mass., (1990).

32. "Anomalous Dispersion of the Nonresonant Electronic Kerr Effect", D.J. Hagan, M. Sheik-Bahae, D.C. Hutchings, A.A. Said, E. Canto-Said, T.H. Wei, and E.W Van Stryland, 1st European Quantum Electronics Conference, Edinburgh, U.K. (1991).

33. "Excited State Absorption and Refraction in Metallophthalocyanine Solutions", T.H. Wei, D.J. Hagan, M. Sence, J.W. Perry, L.R. Khundkar, and D.R. Coulter, Conference on Lasers and Electro-Optics (CLEO), Baltimore, Md., (1991).

34. "Dual Wavelength Z-Scan", M. Sheik-Bahae, J.R. Desalvo, J.W. Wang, D.J. Hagan, and E.W Van Stryland, Conference on Laser and Electro-Optics (CLEO), Baltimore, Md., (1991).

35. "Nondegenerate Bound-Electronic Kerr Effect n2 (w1;w2) in Semiconductors", M. Sheik-Bahae, D.C. Hutchings, D.J. Hagan, and E.W. Van Stryland, Quantum Electronics and Laser Science Conference (QELS), Baltimore, Md., (1991).

36. "Cascaded Second Order Nonlinear Refraction in KTP", R. DeSalvo, M. Sheik-Bahae, D.J. Hagan, E.W. Van Stryland and G. Stegeman, International Laser Science Conference of the American Physical Society, Monterey, Ca., Sept. 22-26, (1991).

37. "Excited State Nonlinear Absorption and Refraction in Organic Solutions", T.H. Wei, D.J. Hagan, E.W. Van Stryland, J.W. Perry, S.R. Marder, D. Alvarez and K.J. Perry, IV International Topical Meeting on Optics of Liquid Crystals, Cocoa Beach, FL, (Oct 7-11, 1991)

38. "Time Resolved Measurements of Nondegenerate Optical Nonlinearities", J. Wang, M. Sheik-Bahae, A.A. Said, D.J. Hagan and E.W. VAn Stryland, CLEO, Anaheim, CA (May, 1992).

39. "Measurement of the Dispersion of n2 in Wide-Gap Materials from the IR to UV", A.A. Said, R. De Salvo, B. Ray, M. Sheik-Bahae, D.J. Hagan and E.W. Van Stryland. Nonlinear Optics, Materials, Fundamentals and Applications, Maui, OSA Technical Digest Vol. 18, (1992).

40. "Time Resolved Measurements of Nondegenerate Optical Nonlinearities", J. Wang*•, M. Sheik-Bahae, A.A. Said, D.J. Hagan and E.W. Van Stryland, CLEO, Anaheim, CA (May, 1992).

41. “Self-Focusing and Optical Damage in Cr:LiSAF and Cr:LiCAF”, M. Richardson, M.J. Soileau, P. Beaud, R. DeSalvo*, S. Garnov, D.J. Hagan, S. Klimentov, K. Richardson, M. Sheik-Bahae, A.A. Said*, E.W. Van Stryland and B.H.T. Chai, SPIE Conference 1848, Los Angeles (1992).

42. “Z-Scan Characterization of Nonlinear Optical Materials”, E.W. Van Stryland, M. Sheik-Bahae, A.A. Said*•, T. Xia*, J. Wang* and D.J. Hagan, QELS’93, paper QFA1.

43. “EZ-Scan - A Method To Achieve a Sensitivity to Induced Phase Distortion of λ/3000”, T. Xia*•, C. Wamsley**, Z. Wang*, A.A. Said*, M. Sheik-Bahae, D.J. Hagan, and E.W. Van Stryland, CLEO ‘93, paper CF11.

44. “Low Threshold Tandem Optical Limiters with large Dynamic Range”, T. Xia*•, D.J. Hagan, and E.W. Van Stryland, CLEO ‘93, paper CF14.

45. “Two-Photon Coherence and Symmetry of χ(3) in Semiconductors”, M. Sheik-Bahae, J. Wang*, E. Canto-Said*, R. DeSalvo*, D.J. Hagan, and E.W. Van Stryland, QELS ‘93, paper QTuK26.

46. “EZ-Scan: A New Method to Measure Optical Nonlinearities with High Sensitivity”, T. Xia*•, C.C. Wamsley**, F. Senesi**, Z. Wang*, A.A. Said*, M. Sheik-Bahae, D.J. Hagan, and E.W. Van Stryland, Young Scholar Symposium on Laser Science by Academy of China, Shanghai, China, Aug., (1993).

47. “All-Optical Switching in KTP with Second Order Nonlinearities”, M. Sheik-Bahae, Z. Wang*•, D.J. Hagan, G. Stegeman, E.W. Van Stryland and G. Assanto, CLEO, Anaheim, CA, (1994).

48. “Second-Harmonic Controlled All-Optical Modulation by Cascading”, D.J. Hagan, M. Sheik-Bahae, Z. Wang*, G. Stegeman, W.E. Torruellas, E.W. Van Stryland and G. Assanto, Nonlinear

Optics: Materials, Fundamentals and Applications Second Topical Meeting, Waikoloa, Hawaii, (1994).

49. “Damage Threshold Measurements of Quartz Windows”, A.A. Said, T. Xia*, A. Dogariu*, D.J. Hagan, and E.W. Van Stryland, 1994 Boulder Damage Conference, Boulder, CO (1994).

50. “Tandem Limiter Optimization”, D.J. Hagan, T. Xia*•, A.A. Said and E.W. Van Stryland, SPIE, Orlando, FL. (1994).

51. “All Optical Switching Using Second-Order Nonlinearities in KTP”, Z. Wang*•, D.J. Hagan, M. Sheik-Bahae, R. DeSalvo*, G. Stegeman, E.W. Van Stryland and G. Assanto, SPIE, Orlando, FL. (1994).

52. “EZ-Scan: Single Beam Measurement Technique for Thin Film Nonlinearities”, T. Xia*•, M. Sheik-Bahae, Z. Wang*, A.A. Said, D.J. Hagan, and E.W. Van Stryland, SPIE, Orlando, FL. (1994).

53. “An Improved Z-scan Technique”, M. Mohebi, A. Said, T. Xia*, M. Sheik-Bahae, D.J. Hagan, and E.W. Van Stryland, joint meeting of the Canadian, American and Mexican Physical Society, Cancun, Mexico, Sept. 26-30, (1994).

54. “Optical Nonlinearities in Diamond”, M. Sheik-Bahae, J.R. Desalvo*, A.A. Said, D.J. Hagan, M.J. Soileau and E.W. Van Stryland, Boulder Damage Conference, SPIE, (1994)

55. “Origin of self-focusing of nanosecond pulses in ZnSe”, T. Xia, D.J. Hagan, E. W. Van Stryland and M. Sheik-Bahae, CLEO, Baltimore, (June, 1995)

56. “Nonlinear Optical Characterization of zinc-tetra(p-methoxyphenyl) tetrabenz porphyrin”, A.A. Said, A. Dogariu, T. Xia, D.J. Hagan, E. W. Van Stryland, J. F Roach and M. Nakashima, CLEO, Baltimore, (June, 1995)

57. "Phase-Insensitive, Single Wavelength, All-Optical Transistor Based on Cascaded Second-Order Nonlinearities", Zuo Wang, D.J. Hagan, and E. Van Stryland, Nonlinear Optics Conference, (Maui, Hawaii, July 8-12, 1996).

58. "Cascaded Second Order Effects under Large Temporal and Spatial Walkoff", William E. Torruellas, Zuo Wang, D.J. Hagan, E. Van Stryland, Petar Vidakovik, and Joseph Zyss, QELS, (Anaheim, CA, June 3-7, 1996).

59. "A Phase-Insensitive All-Optical Transistor Using Second-Order Nonlinear Media, Zuo Wang, D.J. Hagan, and E. Van Stryland, IQEC, (Sydney, Australia, July 15-19, 1996).

60. "Cascaded Second Order Effects in NPP", E. Van Stryland, Z. Wang, D.J. Hagan, J. Zyss, P. Vidakovik and W. Torruellas, QELS, (Anaheim, CA, 1996).

61. “High performance liquid-based passive optical limiter”, T. Xia, D.J. Hagan, A.A. Said, A. Wajsgrus, S. Yang, D. Kovsh and E. W. Van Stryland, CLEO, (Anaheim, CA, 1996).

62. “Femtosecond Continuum Probe Measurements of Nonlinearities of Organic Dyes”, P. Buck, A. Dogariu, D.J. Hagan and E.W. Van Stryland, Conf. on Nonlinear Optical Liquids, SPIE, (Denver, 1996)

63. “Optical Limiting in Inorganic Metallic Clusters and Carbon Black Suspensions”, A. Dogariu, T. Xia, D.J. Hagan, A.A. Said, E.W. Van Stryland and S. Shi, Conf. on Nonlinear Optical Liquids, SPIE, (Denver, 1996)

64. “Two-Beam Coupling in Liquids via Stimulated Rayliegh-Wing Scattering”, A. Dogariu, T. Xia, D.J. Hagan, A.A. Said, E.W. Van Stryland and N. Bloembergen, Conf. on Nonlinear Optical Liquids, SPIE, (Denver, 1996)

65. “Liquid-Based Multicell Optical Limiter”, A.A. Said, T. Xia, D.J. Hagan, A. Wajsgrus, S. Yang, D. Kovsh and E.W. Van Stryland, Conf. on Nonlinear Optical Liquids, SPIE, (Denver, 1996)

66. “Purely refractive energy transfer in dielectric media with chirped, 100 fs laser pulses.”, A. Dogariu and D. J. Hagan, QELS, Baltimore, (1997)

67. “Phase-Insensitive All-Optical TransistorsBased on Second-Order Nonlinearities,” Sungwon Kim, Zuo Wang, David J. Hagan, Eric W. Van Stryland, A. Kobyakov, F. Lederer and Gaetano Assanto, CLEO, (Baltimore, 1997)

68. “Low-frequency Raman gain measurements Using Chirped-Pulse Two-Beam Coupling”, D. J. Hagan, A. Dogariu and E. W. Van Stryland, LEOS Annual Meeting, San Francisco, 1997.

69. “Reverse Saturable Absorption In Polymethine Dyes”, S. Khodja, D.J. Hagan, J. Lim, S. Wang, D. Kovsh, and E. Van Stryland, O. Przhonska, SPIE Conference on Nonlinear Optical Liquids and Power Limiting, San Diego, July 1997.

70. “Optimization of optical limiting performance in converging beam geometries.", D. J. Hagan, S. Khodja, S. Yang, D. Kovsh, P. Suedmeyer and E. W. Van Stryland. SPIE Conference on Nonlinear Optical Liquids and Power Limiting, San Diego, (July 1997)

71. "Excited-State Absorption Spectroscopy of Metallo-Porphyrin Dyes with Both Q and B-Band Excitation", T. Sean Ross, David J. Hagan, Arthur Dogariu, Paul M. Buck and Eric W. Van Stryland, CLEO 98, San Fransisco, 1998.

72. "Spectral Measurements of Nonlinear Absorption in Polymethine and Squarylium Dyes", J.H. Lim, O. Przhonska, T. S. Ross, D. Hagan, and E. Van Stryland, CLEO 98, San Fransisco, 1998.

73. “Nonlinear spectrometry of chromophores for optical limiting” D. J. Hagan, E. Miesak, R. Negres, S. Ross, J. Lim and E. W. Van Stryland, SPIE Conference on Nonlinear Optical Liquids and Power Limiting, San Diego (1998).

74. “Software for computer modeling of laser pulse propagation through an optical system with nonlinear optical elements.” D. I. Kovsh, S. Yang, D.J. Hagan and E.W. Van Stryland, Proc. SPIE-3472, 163-177 (1998).

75. (Invited) “Optical Limiting: Characterization and Numerical Modeling”, Eric W. Van Stryland, Dmitriy I. Kovsh, Raluca Negres, David J. Hagan, Vladislav Dubikovsky, and Kevin Belfield, NATO Advanced Research Workshop on “ Mutiphoton and Light Driven Multielectron Processes in Organics: Materials, Phenomena, Applications”, Menton, France, Aug. 1999.

76. “Femtosecond White-Light Continuum for Characterization of Organic Molecules”, R. Negres, E. Van Stryland, D. Hagan, K. Belfield and B. Reinhardt, CLEO 99, Baltimore, 1999.

77. "Studies of Z-Scan with 'Ring'-Shaped Beams", D. I. Kovsh, D. J. Hagan, E. W. Van Stryland, CLEO 99, Baltimore, 1999.

78. "Optical Limiting via nonlinear scattering with sol-gel host materials." D. J. Hagan, S. Yang, C. Basanez, E. W. Van Stryland, W. V. Moreshead and J.-L. Nouges, SPIE conf. on power limiting materials and devices, Denver, 1999.

79. “Two-photon photoinitiated polymer processing and microfibrication”, Kevin Belfield, X. Ren, D. Hagan, E.W. Van Stryland, V. Dubikovsky and E. Miesak, Organic Thin Films for Photonic Applications, Santa Clara, CA, Sept. 24-6, 1999.

80. “Optical Limiting with Neutral Nickeo Dithiolene Complexes”, W. L. Tan, Wei Ji, J.F. Bai, J.L. Zuo, X.Z.You, J. Lim, S. Yang, D. Hagan and E. Van Stryland, Fall MRS meeting, Boston, MA, Nov. 29-Dec. 3, 1999.

81. “Optical Limiter Design Testing and Modeling”, D. Hagan, S. Yang, D. Kovsh and E. Van Stryland, Fall MRS meeting, Boston, MA, Nov. 29-Dec. 3, 1999.

82. “Nonlinear Optical Laser Beam Propagation Through Semiconductor Materials, Shekhar Guha, C. Rayerson, D. Hagan, V. Dubikovsky, E. Van Stryland, and S. Krishnamurthy, Fall MRS meeting, Boston, MA, Nov. 29-Dec. 3, 1999.

83. “Investigation of Optical Limiting Mechanisms in Multi-Walled Carbon Nanotubes”, X. Sun, Y. Xiong, P. Chen, J. Lin, Wei Ji, J. Lim, S. Yang, D. Hagan and E. Van Stryland, Fall MRS meeting, Boston, MA, Nov. 29-Dec. 3, 1999.

84. “Measurement of relations between molecular structure and two-photon absorption spectra in fluorene dye compounds”, David J. Hagan, Kevin D. Belfield, Katherine J. Schafer, Raluca Negres, Wael Mourad and Eric W. Van Stryland, International Conference on Organic Nonlinear Optics (ICONO) 2000, Davos, Switzerland (1999)

85. “Femtosecond Spectroscopy of Polymethine Dyes in Liquid and Polymeric Media”, Olga V. Przhonska, Mikhail V. Bondar, Yurij L. Slominskyà, Raluca Negres, JinHong Lim, David J. Hagan, and Eric W. Van Stryland, International Conference on Organic Nonlinear Optics (ICONO) 2000, Davos, Switzerland (1999).

86. “Near-IR Nonlinear Organic Photochemistry and Nonlinear Absorption”, Belfield, K. D.; Hagan, D. J.; Van Stryland, E. W.; Schafer, K. J.; Negres, R.; Ren, X.; Dubikovsky, V., 1999 Organic Photochemistry Gordon Research Conference, Connecticut College, New London, CT, July 17-22, 1999.

87. (Postdeadline paper): F. E. Hernández, S. Yang, E. W. Van Stryland and D. J. Hagan, “High dynamic range, cascaded-focus nanosecond optical limiter”, CLEO 2000 San Francisco, CA, May 2000.

88. F. E. Hernández and D. J. Hagan, “continuously variable, “wavelength-independent polarization rotator”, CLEO 2000 San Francisco, CA, May 2000..

89. E. W. Van Stryland, S. S.Yang, F. E. Hernández, V. Dubikovsky, and D. J. Hagan, “cascaded optical limiters and modeling”, ISOPL 2000, Venice, Italy (2000)

90. A. Kobyakov, D. J. Hagan, E. W. Van Stryland, "Effect of laser pulse shape on optical limiting properties of reverse saturable absorbers," in Nonlinear Optics: Materials, Fundamentals and Applications, OSA Technical Digest, paper WB1, pp. 196-198 (2000).

91. A. Kobyakov, D. J. Hagan, E. W. Van Stryland, S. Darmanyan, and F. Lederer, "Stability of narrow discrete solitons in quadratic nonlinear media," Nonlinear Optics: Materials, Fundamentals and Applications, OSA OSA, Kauai, Hawaii, Aug 6-10, 2000

92. A. Kobyakov, D. J. Hagan, and E. W. Van Stryland, "Dynamics of excited-state absorbers: an analytical approach," in Quantum Electronics and Laser Science Conference, San Francisco, May, 2000.

93. V. Dubikovskiy, A. Kobyakov, and D. J. Hagan, "Novel all-optical switching mechanisms in media with quadratic nonlinearity," in Quantum Electronics and Laser Science Conference, San Francisco, May, 2000

94. F. E. Hernández, S. Yang, E. W. Van Stryland and D. J. Hagan, “Electrostriction effect contribution for high dynamic range optical limiters”, Nonlinear Optics: Materials, Fundamentals and Applications, OSA, Kauai, Hawaii, Aug 6-10, 2000

95. F.E Hernandez, D.J Hagan, "Continuously variable, wavelength-independent polarization rotator" Conference on Lasers and Electro-Optics CLEO, San Francisco, May, 2000.

96. F. E. Hernández, S. Yang, E. W. Van Stryland and D. J. Hagan, “Electrostriction effect contribution for high dynamic range optical limiters”, Nonlinear Optics: Materials, Fundamentals and Applications, OSA, Kauai, Hawaii, Aug 6-10, 2000.

97. W. Shensky III, F. E. Hernández, V. Dubikovskiy, E. W. Van Stryland, D. J. Hagan, "Enhancement of nonlinear self-action in CS2 for nanosecond optical limiting", CLEO, Baltimore, USA (2001).

98. J. Hales, K. J. Schafer, A. M. Morales, K. D. Belfield, D. J. Hagan, and E. W. Van Stryland, “Two-Photon Absorption Spectra of Fluorene Derivatives”, CLEO 2002, Long Beach, CA.

99. D. J. Hagan, O. Przhonska, R. Negres, E. Van Stryland, E. Novikov, M. Bondar, Yu. Slominsky, A. Kachkovski. Excited-state absorption and reorientation in polymethine and squarylium dyes. 5th Mediterranean Workshop and Topical Meeting "Novel Optical Materials and Applications", NOMA' 01, Cetraro, Italy, May 20-26, 2001.

100. R. Lepkowicz, O. Przhonska, D. Hagan, and E. Van Stryland, “Orientation of transition moments in excited-state absorption of polymethine and squarylium dyes”, CLEO, Long Beach, CA, May 19-24, 2002.

101. F. E. Hernández, C. R. Mendonça, Ion Cohanoschi, W. Shensky III, D. J. Hagan and E. W. Van Stryland, "Viscosity Dependence of Optical Limiting in Carbon Black Suspensions", CLEO'02, Long Beach, CA, 2002.

102. W. Shensky III, Ion Cohanoschi, F. E. Hernández, D. J. Hagan and E. W. Van Stryland, "Broadband optical limiter using carbon-black suspensions in CS2", CLEO'02, Long Beach, CA, 2002.

103. “Chemical structure/nonlinear optical property relations for fluorenyl ring system derivatives”, J. Hales, K. J. Schafer, A. M. Morales, K. D. Belfield, D. J. Hagan, and E. W. Van Stryland, NLO 2002, Maui, HI, 2002.

104. “Excited state dynamics in polymethine molecules detected by polarization-resolved pump-probe measurements, R.S. Lepkowicz, O.V. Przhonska, D. J. Hagan, E. W. Van Stryland, M.V. Bondar, and Yu. L. Slominsky, NLO 2002, Maui, HI, 2002.

105. “Carbon-black suspension based broadband optical limiter”, W. Shensky III, I. Cohanoschi, F. E. Hernandez, E. W. Van Stryland, and D. J. Hagan, NLO 2002, Maui, HI, July, 2002.

106. “Two-photon absorptivities of common photoinitiators characterized via degenerate and nondegenerate NLO methods”, Kevin Belfield, Katherine Schafer, Joel Hales, Mihaela Balu, Eric Van Stryland, and David Hagan, RadTech Asia '03, the 9th International Conference on Radiation Curing, June 3-6, 2003 Yokohama, Japan.

107. “Nonlinear optical spectroscopic characterization of a series of fluorene derivatives, J. M. Hales, K. J. Schafer, A. R. Morales, K. D. Belfield, D. J. Hagan, E. W. Van Stryland, Proceedings of SPIE Vol. 5211, [5211-05], Nonlinear Optical Transmission and Multiphoton Processes in Organics, San Diego, CA Aug. 2003.

108. “Reactive two-photon fluorescent probes for biological imaging, K. D. Belfield, K. J. Schafer, S. Yao, J. M. Hales, E. W. Van Stryland, D. J. Hagan, Proceedings of SPIE Vol. 5211, [5211-15], Nonlinear Optical Transmission and Multiphoton Processes in Organics, San Diego, CA Aug. 2003.

109. “Resonant enhancement of nondegenerate two photon absorption in organics”, J. M. Hales, D. J. Hagan, E. W. Van Stryland, Conference on Lasers and Electro Optics, Baltimore, MD, 2003, paper CThN2

110. “Polarization-resolved pump-probe method to determine the excited states of polymethine molecules” R. Lepkowicz, C. Cirloganu, O. V. Przhonska, D.J. Hagan and E. W. Van Stryland, Conference on Lasers and Electro Optics, Baltimore, MD, 2003, paper CThN6

111. “Two-photon induced excited-state absorption in high-index glass”, William Shensky III, Ion Cohanoschi, Armen Sevian, David Hagan, and Eric Van Stryland, Boulder Damage Symposium, Boulder, CO, 2003.

112. “Resonant enhancement of nondegenerate two photon absorption in organics”, J. M. Hales, D. J. Hagan, E. W. Van Stryland, Conference on Lasers and Electro Optics, Baltimore, MD, 2003, paper CThN2

113. “Polarization-resolved pump-probe method to determine the excited states of polymethine molecules” R. Lepkowicz, C. Cirloganu, O. V. Przhonska, D.J. Hagan and E. W. Van Stryland, Conference on Lasers and Electro Optics, Baltimore, MD, 2003, paper CThN6

114. “Two-photon absorptivities of common photoinitiators characterized via degenerate and nondegenerate NLO methods”, Kevin Belfield, Katherine Schafer, Joel Hales, Mihaela Balu, Eric Van Stryland, and David Hagan, RadTech Asia '03, the 9th International Conference on Radiation Curing, Yokohama, Japan., June 3-6, 2003

115. “Nondegenerate Nonlinear Absorption Spectral Measurements”, E. W. Van Stryland, J. Hales, K. Belfield and D. J. Hagan, International Conference on Photonresponsive Organics and Polymer (2nd ICPOP), Busan, Korea, Feb. 16-20, 2004.

116. “White-light continuum Z-scan technique for nonlinear materials characterization”, Mihaela Balu, Joel Hales, David J. Hagan, Eric Van Stryland; CLEO 2004, (San Francisco, CA, 2004) paper CThJ1.

117. Measurement of nondegenerate two-photon absorption spectra of single crystal polydiacetylene, Jie Fu, Mihaela Balu, Joel M. Hales, David J. Hagan, Eric W. Van Stryland, Fumiyo Yoshino; IQEC 2004, (San Francisco, CA, 2004) paper IThG8.

118. “Femtosecond to Nanosecond Characterization of the excited-state properties of polymethine molecules”, R.S. Lepkowicz, J. Fu, C.M. Cirloganu, O.V. Przhonska, D. J. Hagan, E. W. Van Stryland, M.V. Bondar, and Yu. L. Slominsky, NLO 2004, Kona, HI, 2004

119. “White-Light Continuum Z-scan Technique for Nonlinear Materials Characterization”, M. Balu, J. Hales, D.J. Hagan, E.W. Van Stryland, NLO 2004, Kona, HI, 2004

120. “Effects of extending conjugation length on the two-photon absorption spectra of fluorene molecules”--J. M. Hales, A. M. Morales, S. Yao, K. J. Schafer, K. D. Belfield, D. J. Hagan, E. W. Van Stryland, P. Pacher, O. Kwon, E. Zojer, J. L. Bredas; NLO 2004, Kona, HI, 2004

121. Two-photon absorption and the dispersion of nonlinear refraction using a white-light continuum Z-scan, 2005 Quantum Electronics and Laser Science Conference (QELS) (IEEE Cat. No. 05CH37696), 2005, Pages 785-787 Vol. 2, Balu, M. ; Hales, J.; Hagan, D.J.; Van Stryland, E.W.

122. Optical nonlinearities in CdTe quantum-dot doped glass for optical switching, 2005 Conference on Lasers and Electro-Optics (CLEO) (IEEE Cat. No. 05TH8796), 2005, Pages 651-653 Vol. 1, Padilha, L.A. ; Fu, J.; Hagan, D.J.; Van Stryland, E.W.; Cesar, C.L.; Barbosa, L.C.; Brito-Cruz, C.H.

123. Organic Materials with Very Large Two-Photon Cross-sections”, Stephen Barlow, Arianna Biesso, Jean-Luc Brédas, Jian-Yang Cho, Sung-Jae Chung, Joel M. Hales, Seth R. Marder, Joseph W. Perry, Toru Odani, Karin Schmidt, Shijun Zheng, Egbert Zojer, Jie Fu, David J. Hagan, Lazaro A. Padilha, Eric W. Van Stryland,, Luca Beverina, Giorgio Pagani, IXth International Conference on Frontiers of Polymers and Advanced Materials, Cracow (Poland), 2007.

124. “Linear and Nonlinear Absorption Studies of Polymethine, Squaraine and Tetraone Dyes”, Scott Webster, Jie Fu, Olga V. Przhonska, Lazaro A. Padilha, David J. Hagan, Eric W. Van Stryland, Mikhail V. Bondar, Yuriy L. Slominsky, Alexei D. Kachkovski, CLEO, paper CThD5, Baltimore, MD, May 2007.

125. “Resonant Nonlinear Optical Properties of CdSe Quantum Dots”, Gero Nootz, Lazaro A. Padilha, Scott Webster, David J. Hagan, Eric W. Van Stryland, CLEO, paper CThV2, Baltimore, MD, May 2007.

126. “Energy bandgap dependence of three-photon absorption in semiconductors” Peter D. Olszak, Scott Webster, Lazaro A. Padilha, Claudiu M. Cirloganu, Milton Woodall, David J. Hagan, and Eric W. Van Stryland, OSA Nonlinear Optics Topical Meeting, Kona, HI, August 2007.

127. “Nonlinear Refraction of Semiconductor Quantum Dots Using Single Wavelength and White-Light Continuum Z-scan” Lazaro A. Padilha, Gero Nootz, Mihaela Balu, David J. Hagan, and Eric W. Van Stryland, OSA Nonlinear Optics Topical Meeting, Kona, HI, August 2007.

128. S. Webster, L.A. Padilha, H. Hu, O.V. Przhonska, D.J. Hagan, E.W. Van Stryland, M.V. Bondar, I.G. Davydenko, Y.L. Slominsky, and A.D. Kachovski, “Effect of dihydro-benzo-furoindolium terminal groups on linear and excited state absorption of near IR cyanine dyes”, ICONO10/ICOPE 2008, in Third-Order Nonlinear Optics (2008).

129. A. Salandrino, S. Fardad, E.L. Wood, S. Webster, L.A. Padilha, F.E. Hernandez, D.J. Hagan, E.W. Van Stryland, “Fluorescence Dynamics in Plasmonic Core-Shell Nanoparticles” The 21st Annual Meeting of The IEEE Lasers & Electro-Optics Society, Paper MA in Plasmonic Emission Control (2008).

130. L.A. Padilha, G. Nootz, M. Balu, D. J. Hagan, E. W. Van Stryland, “Characterization of NLO properties of Organic Molecules and Quantum dots by White-Light Continuum Z-scan” Conference on Novel Optical Materials and Applications, Cetraro, Italy, June 2007. (Invited)

131. S. Webster, L. Padilha, H. Hu, O. Przhonska, D. Hagan, E. Van Stryland, M. Bondar, I. Davydenko, Y. Slominsky, and A. Kachkovski, "Excited State Absorption and Femtosecond Lifetime Dynamics in a New Series of Near IR Dyes," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, OSA Technical Digest (CD) (Optical Society of America, 2008), paper QTuF5.

132. S. Webster, S. Odom, D. Peceli, L. Padilha, O. Przhonska, H. Hu, G. Nootz, A. Kachkovski, S. Barlow, H. Anderson, S. Marder, D. Hagan, and E. Van Stryland, "Temporal and Spectral Nonlinear Absorption Characterization of a Hybrid Porphyrin-Squaraine-Porphyrin Macromolecule," in Laser Science XXIV, OSA Technical Digest (CD) (Optical Society of America, 2008), paper LWC4.

133. C. Cirloganu, P. Olszak, L. Padilha, S. Webster, D. Hagan, and E. Van Stryland, "Spectral

Behavior of Three-Photon Absorption in Zinc-Blende Semiconductors," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, OSA Technical Digest(CD) (Optical Society of America, 2008), paper CFX2.

134. G. Nootz, L. Padilha, T. Ensley, S. Webster, D. Hagan, E. Van Stryland, S. Hoogland, and E. Sargent, "Carrier Dynamics and Two Photon Processes in PbS Quantum Dots," in Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America, 2008), paper FWE3.

135. A. Salandrino, L. Padilha, S. Webster, C. Fuentes-Hernandez, B. Kippelen, D. Hagan, and E. Van Stryland, "Observation of Plasmonic Field-Enhancement of the Nonlinear Response of Gold Thin Films" in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, OSA Technical Digest (CD) (Optical Society of America, 2008), paper QThA6.

136. Olga V. Przhonska, Scott Webster, Lazaro A. Padilha, Mykhailo V. Bondar, Andriy O. Gerasov, Yuriy P. Kovtun, Mykola P. Shandura Yuriy L. Slominsky, Alexey D. Kachkovski, David J. Hagan, Eric W. Van Stryland, “Development of near IR cyanine dyes for nonlinear optical applications”11th International Conference on Methods and Applications of Fluorescence: Spectroscopy, Imaging and Probes, Budapest, Hungary, Sept. 6-9, 2009.

137. E. Van Styrland, D. Hagan, S. Webster, L. Padilha, MJ Soileau, "Nonlinear optical spectroscopy: absorption and refraction", Boulder Damage Symposium, Boulder CO, Sept. 20-23, 2009.

138. S. Webster, S.A. Odom, L.A. Padilha, O.V. Przhonska, D. Peceli, H. Hu, G. Nootz, A.D. Kachkovski, J. Matichak, S. Barlow, H.L. Anderson, S.R. Marder, D.J. Hagan, and E.W. Van Stryland, “Nonlinear Absorption Spectroscopy of a Bis(Porphyrin)-Substituted Squaraine” OSA NLO conference, Honolulu, HI 2009.

139. G. Nootz, L.A. Padilha, S. Webster, D.J. Hagan, E.W. Van Stryland, L. Levina, V. Sukhovatkin, and E.H. Sargent, “Evidence of Symmetry Breaking in Lead Salt Quantum Dots” OSA NLO conference, Honolulu, HI 2009.

140. H. Hu, L.A. Padilha, S. Webster, T.R. Ensley, D. Peceli, O.V. Przhonska, D.J. Hagan, E.W. Van Stryland, M.V. Bondar, Y.L. Slominsky, A.D. Kachkovski, A.O. Gerasov, M.P. Shandura, and Y.P. Kovtun, “Comparison of Linear and Nonlinear Absorption in Three Series of Similar Cyanine Dyes: D-p-D, A-p-A and D-p-A” OSA NLO conference, Honolulu, HI 2009.

141. P.D. Olszak, C.M. Cirloganu, S. Webster, L.A. Padilha, S. Guha, S. Krishnamurthy, D.J. Hagan, and E.W. Van Stryland, “Temperature Dependent Nonlinear Absorption in InSb” OSA NLO conference, Honolulu, HI 2009.

142. H. Hu, L.A. Padilha, S. Webster, D. Peceli, O.V. Przhonska, D.J. Hagan, E.W. Van Stryland, A.O. Gerasovd, M.P. Shandurad, Y.P. Kovtund, and A.D. Kachkovskid, “Linear and nonlinear absorption properties of D-π-A polymethine dyes”, CLEO, 2009.

143. G. Nootz, L.A. Padilha, S. Webster, D.J. Hagan, E.W. Van Stryland, L. Levina, V. Sukhovatkin, and E.H. Sargent, “Evidence of Symmetry Breaking and Carrier Dynamics in Lead Salt Quantum Dots”, CLEO, 2009.

144. P.D. Olszak, C.M. Cirloganu, S. Webster, L.A. Padilha, S. Guha, S. Krishnamurthy, D.J. Hagan, and E.W. Van Stryland, “Spectral and Temperature Dependence of Nonlinear Absorption in InSb”, CLEO, 2009.

145. L.A. Padilha, J.P. Fontana, D. Kohlgraf-Owens, M.F. Moreira, S. Webster, P. Palffy-Muhoray, P.G. Kik, D.J. Hagan, and E.W. Van Stryland, “Linear and nonlinear optical response of aligned

gold nanorods”, CLEO, 2009. 146. A.O. Gerasov, M.P. Shandura, Y.P. Kovtun, A.D. Kachkovski, H. Hu, L.A. Padilha, S. Webster,

O.V. Przhonska, D.J. Hagan, E.W. Van Stryland, “Highly fluorescent NIR dyes based on boron difluoride complex of 3-acetyl-4-hydroxy-7-diethylaminocoumarin” The 11th International Conference on Methods and Applications of Fluorescence: Spectroscopy, Imaging and Probes (2009).

147. O.V. Przhonska, S. Webster, L.A. Padilha, M.V. Bondar, A.O. Gerasov, Y.P. Kovtun, M.P. Shandura, Y.L. Slominsky, A.D. Kachkovski, D.J. Hagan, E.W. Van Stryland, “Development of near IR cyanine dyes for nonlinear optical applications” The 11th International Conference on Methods and Applications of Fluorescence: Spectroscopy, Imaging and Probes (2009).

148. Davorin Peceli, Andriy O. Gerasov, Scott Webster, Honghua Hu, Lazaro Padilha, Volodymyr V. Kurdyukov, Yuriy L. Slominsky, Oleksandr O. Viniychuk, Alexey D. Kachkovski, Artëm E. Masunov, Olga V. Przhonska, David J. Hagan, and Eric W. Van Stryland, "Effective Generation of Triplet States and Singlet Oxygen by Sulfur-Containing Squaraines: Experimental and Theoretical Study" Conference on Lasers and Electro-Optics (CLEO) 2010 paper: CTuR5, OSA Technical Digest (CD), (2010). (2010)

149. Anna Painelli, Francesca Terenziani, Olga Przhonska, Honghua Hu, David Hagan, and Eric Van Stryland, "Essential State Model for Polymethine Dyes: Symmetry Breaking and Spectra" MOLMAT 2010 Conference, July 5-8, 2010, Montpellier, France (2010)

150. Shima Fardad, Lazaro A. Padilha, Scott Webster, Trenton Ensley, Raz Gvishi, Nina Larina, Vladimir Lokshin, Vladimir Khodorkovsky, Mark Sigalov, David J. Hagan, and Eric W. Van Stryland, "Förster Energy Transfer to a Spirooxazine Photochromic Molecule through One- and Two-Photon Absorption" Quantum Electronics and Laser Science Conference (QELS) 2010 paper: QTuE4, OSA Technical Digest (2010)

151. Claudiu M. Cirloganu, Lazaro A. Padilha, Scott Webster, Gero Nootz, David J. Hagan, and Eric W. Van Stryland "Large Enhancement of Two-Photon Absorption in Semiconductors Using Highly Non-Degenerate Photons", Conference on Lasers and Electro-Optics (CLEO) 2010 paper: CFG6, OSA Technical Digest (CD), (2010). (2010)

152. G. Nootz, L. Padilha, S. Webster, D. Hagan, E. Van Stryland, L. Levina, V. Sukhovatkin, and E. Sargent, "Nonlinear Optical Properties of PbS and PbSe Quantum Dots", Optics and Photonics Congress: Nonlinear Photonics, OSA Technical Digest (CD) (Optical Society of America, 2010), paper NThA7, Karlsruhe, Germany June 21-24, 2010. (2010)

153. G. Nootz, L. Padilha, S. Webster, D. Hagan, E. Van Stryland, L. Levina, V. Sukhovatkin, and E. Sargent, "Resonance Enhancement of the Two-Photon Absorption in PbS Quantum Dots" Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America, 2010), paper FThO2. (2010)

154. T. Ensley, D. Fishman, L. Padilha, S. Webster, D. Hagan, and E. Van Stryland "Self-Trapping of Supercontinuum Generated by Femtosecond Pulses in a Noble Gas" International Conference on Ultrafast Phenomena, OSA Technical Digest (CD) (Optical Society of America, 2010), paper ThE28. (2010)

155. C. Cirloganu, P. Olszak, L. Padilha, S. Webster, D. Hagan, and E. Van Stryland, "Three-photon Absorption In Semiconductors " Laser Science, OSA Technical Digest (CD) (Optical Society of America, 2010), paper LTuG3. (2010)

156. H. Hu, A. Gerasov, L. Padilha, O. Przhonska, S. Webster, M. Shandura, Y. Kovtun, A. Masunov,

D. Hagan, and E. Van Stryland "Two-Photon Absorption in Single Crystals of Cyanine-Like Dye" Conference on Lasers and Electro-Optics, OSA Technical Digest (CD) (Optical Society of America, 2010), paper JWA103. (2010)

157. S. Webster, D. Peceli, A.O. Gerasov, H. Hu, L.A. Padilha, V.V. Kurdyukov, Y.L. Slominsky, O.O. Viniychuk, A.D. Kachkovski, A.I. Tolmachov, A.E. Masunov, O.V. Przhonska, D.J. Hagan, E.W. Van Stryland, “Near unity intersystem crossing and singlet oxygen generation quantum yields by sulfur-contianing squaraines” The 9th International Symposium on Functional π-Electron Systems (F-π-9), (2010).

158. L.A. Padilha, H. Hu, S. Webster, O.V. Przhonska, D. Peceli, T.R. Ensley, M.V. Bondar, A.O. Gerasov, Y.P. Kovtun, M.P. Shandura, A.D. Kachkovski, D.J. Hagan, and E.W. Van Stryland, “Large two-photon absorption in a series of highly fluorescent acceptor-pi-acceptor near-IR polymethine dyes” The 9th International Symposium on Functional π-Electron Systems (F-π-9), (2010).

159. "Extreme Nondegenerate Two-Photon Absorption in Semiconductors", Eric Van Stryland, Claudiu Cirloganu, Dmitry Fishman, Scott Webster, Lazaro A. Padilha, and David Hagan, 41st Winter Colloquium on the Physics of Quantum Electronics, Snowbird, Utah, Jan. 2-6, 2011 (2011)

160. "Extreme Nondegenerate Two-Photon Absorption and Spectroscopy", E. W. Van Stryland, D. Fishman, T. Ensley, S. Webster, and D. J. Hagan, 14th Annual Southeast Ultrafast Conference (SEUFC), Oakridge, TN, Jan. 13-14 (2011)

161. E.W. Van Stryland, C.M. Cirloganu, D.A. Fishman, S. Webster, L. A. Padilha, and D.J. Hagan, “Extremely non-degenerate two-photon absorption in semiconductors” American Physical Society (APS), (2011).

162. "Degenerate and Nondegenerate Nonlinear Spectroscopy", D. J. Hagan, E. W. Van Stryland, S. Webster, D. Fishman, H. Hu, T. Ensley and M. Seidel, MRS Fall Meeting, Symposium K, Boston, MA, Nov. 28 - Dec. 2 (2011)

163. "Development of Materials for Third-Order Nonlinear Optics", S. Marder, S. Barlow, J-L. Bredas, S-H. Chi, D. J. Hagan, J. M. Hales, Y. Kada, H-C. Li, J. Matichak, S. Ohira, L. Padilha, J. W. Perry, Eric W. Van Stryland and S. Webster, MRS Fall meeting, Symposium K, Materials for High Power Photonics, Boston, Nov. 28 - Dec. 2 (2011)

164. E. Van Stryland, C. Cirloganu, D. Fishman, S. Webster, L. Padilha, D.J. Hagan, “Large Two-Photon Absorption Enhancement with Extremely Nondegenerate Photons” Conference on Lasers and Electro-Optics (CLEO/QELS) 56, 1 CThR2 (2011).

165. D. Peceli, S. Webster, D. Fishman, C. Cirloganu, H. Pattanaik, H. Hu, O.V. Przhonska, V.V. Kurdyukov, Y.L. Slominsky, A.I. Tolmachev, A.D. Kachkovski, R.R. Dasari, S. Barlow, S.R. Marder, D.J. Hagan, and E. Van Stryland, “Advance in Double Pump-Probe Technique for Triplet Quantum Yield Determination” in Conference on Lasers and Electro-Optics (CLEO/QELS), CTuY4 (2011).

166. T.R. Ensley, D. Fishman, S. Webster, L. Padilha, D J. Hagan, E. Van Stryland, “Seeded Femtosecond Supercontinuum in Kr Gas” Conference on Lasers and Electro-Optics (CLEO/QELS), QMD6 (2011).

167. O. Kahl, D. Fishman, S. Webster, D.J. Hagan, E.W. Van Stryland, “Understanding thermal nonlinearities in metal nanoparticles for plasmon-enhanced two-photon absorption” CIOMP-OSA International Summer Session: Lasers and Their Applications (2011).

168. H. Pattanaik, D.A. Fishman, S. Webster, D.J. Hagan, and E.W. Van Stryland “Two-photon

emission in direct-gap semiconductors” CIOMP-OSA International Summer Session: Lasers and Their Applications (2011).

169. C.M. Cirloganu, D.A. Fishman, S. Webster, L.A. Padilha, M. Monroe, D.J. Hagan, and E.W. Van Stryland, “Extremely Nondegenerate Two-Photon Detection of Sub-Bandgap Pulses” IQEC/CLEO Pacific Rim Conference, (2011).

170. S. Webster, O.V. Przhonska, H. Hu, D. Peceli, D.A. Fishman, L.A. Padilha, M.V. Bondar, A.O. Gerasov, Y.P. Kovtun, M.P. Shandura, Y.L. Slominsky, A.D. Kachkovski, D.J. Hagan, and E.W. Van Stryland, “Cyanine and Cyanine-like Dyes for Nonlinear Optical Applications” The Int. Conf. on Luminescence & Optical Spectroscopy of Condensed Matter (ICL'11), (2011).

171. H. Hu, D.A. Fishman, A. Gerasov, L.A. Padilha, O.V. Przhonska, S. Webster, D. Peceli, M. Shandura, Y. Kovtun, A. Kachkovski, A.E. Masunov, P. Tongwa, T.V. Timofeeva, D.H. Hagan, and E.W. Van Stryland, “Spectral Properties And Two-photon Absorption Of Asymmetric Donor-π-acceptor Molecule In Solutions And Single Crystal Form” The Int. Conf. on Luminescence & Optical Spectroscopy of Condensed Matter (ICL'11), (2011).

172. Honghua, H.; Dmitry, A. F.; Scott, W.; Marcus, S.; Lazaro, A. P.; David, J. H.; Eric, W. V. S. In Pulsewidth and Wavelength Dependent Optical Nonlinearities of Carbon Disulfide, Topical Meeting on Nonlinear Optics, Optical Society of America: 2011; p NWE12.

173. "Extreme Nondegenerate Two-Photon Absorption", E. W. Van Stryland, C. M. Cirloganu, L. A. Padilha, S. Webster, and D. J. Hagan, General Congress of the International Commission for Optics (ICO-22), Puebla, Mexico, Aug. 15-19 (2011)

174. "Nonlinear Spectroscopy", E. W. Van Stryland, T. Ensley, H. Hu, M. Seidel, D. Peceli, D. Fishman, S. Webster, and D. J. Hagan, 12th International Conference on Organic Nonlinear Optics and the International Conference on Organic Photonics and Electronics (ICONO12/ICOPE) Dublin, Ireland, Sept. 6-9 (2011)

175. "Nonlinear Spectroscopy of Organics (and other materials)", D. J. Hagan, T. Ensley, H. Hu, M. Seidel, D. Peceli, D. Fishman, S. Webster, and Eric W. Van Stryland, INWPB, St. Germain au Mont D’or, France, October 27 (2011)

176. "Seeded Femtosecond Supercontinua in Various Media", T.R. Ensley, D.A. Fishman, S. Webster, D.J. Hagan, and E.W. Van Stryland, Frontiers in Optics/Laser Science XXVII (FIO/LS), San Jose, CA, Oct. 16-20 (2011). (2011)

177. "Seeded Supercontinuum Generation in Gases and Condensed Matter", Trenton R. Ensley, Dmitry A. Fishman, Scott Webster, David J. Hagan, and Eric W. Van Stryland, Nonlinear Optics Conference, Kauai, Hawaii, July 17-22, 2011. (2011)

178. "Extremely Nondegenerate Two-Photon Absorption and Detection in Direct Gap Semiconductors", Claudiu M. Cirloganu, Dmitry A. Fishman, Scott Webster, Lazaro A. Padilha, Morgan Monroe, David J. Hagan, and Eric W. Van Stryland, Nonlinear Optics Conference, Kauai, Hawaii (2011)

179. "Spectral Properties And Two-photon Absorption Of Asymmetric Donor-p-acceptor Molecule In Solutions And Single Crystal Form", H. Hu, D.A. Fishman, A. Gerasov, L.A. Padilha, O.V. Przhonska, S. Webster, D. Peceli, M. Shandura, Y. Kovtun, A. Kachkovski, A.E. Masunov, P. Tongwa, T.V. Timofeeva, D.H. Hagan, and E.W. Van Stryland, The Int. Conf. on Luminescence & Optical Spectroscopy of Condensed Matter (ICL'11), Ann Arbor. Michigan, June 26-July 1 (2011). (2011)

180. "Thermal Nonlinearities in Gold Nanostructures", Kahl, O.; Fishman, D. A.; Webster, S.; Niesler,

F.; Wegener, M.; Hagan, D. J. and Van Stryland, E. W., Access Networks and In-house Communications, Colorado Springs, CO, June17, 2012, JM5A.36. (2012)

181. "Dual-Arm Z-scan for measuring nonlinearities of solutes in solution ", Manuel R. Ferdinandus, Matthew Reichert, Trenton R. Ensley, Honghua Hu, Dmitry A. Fishman, Scott Webster, David J. Hagan, and Eric W. Van Stryland, IEEE, Nonlinear Photonics 2012, Colorado Springs, CO, June 17-21 2012 (2012)

182. "IR detection in wide-gap semiconductors using extreme nondegenerate two-photon absorption, "Himansu Pattanaik, Dmitry Fishman, Scott Webster, David Hagan, Eric Van Stryland, CLEO/QELS 2012, San Jose, CA, paper QF2G.7 (2012)

183. "Nonlinear optical study of oxygen-sulfur squaraines" Davorin Peceli, Honghua Hu, Scott Webster, Dmitry Fishman, Olga Przhonska, Vladimir V. Kurkyukow, Yurii L. Slominsky, Alexey D. Kachkovski, David Hagan, Eric Van Stryland CLEO/QELS 2012, San Jose, CA, paper JW4A.48 (2012)

184. "Extremely Non-Degenerate Two-Photon Emission in Direct-Gap Semiconductors", Reichert, M. C.; Turnbull, B.; Fishman, D. A.; Pattanaik, H. S.; Webster, S.; Hagan, D. J. and Van Stryland, E. W., Frontier in Optics: Laser Science 2012, pp LTh2I.6 (talk) (2012)

185. "IR detection in wide-gap semiconductors using extreme nondegenerate two-photon absorption, ", H. Pattanaik, D. Fishman, S. Webster, D. J. Hagan, E. W. Van Stryland, CLOE/QELS 2012, San Jose, CA, paper QF2G.7 (2012)

186. "Measuring small solute nonlinearities in solution by dual-arm Z-Scan technique", Ferdinandus, M. R.; Reichert, M.; Ensley, T. R.; Fishman, D. A.; Webster, S.; Hagan, D. J. and Van Stryland, E. W., Frontiers in Optics, Rochester, NY, 2012. (2012)

187. "Nondegenerate 2-Photon Absorption Spectroscopy and Detection", Eric Van Stryland, Himansu S. Pattanaik, Dmitry A. Fishman, Scott Webster, David J. Hagan, NLO50,50 Years of Nonlinear Optics International Symposium, ICFO, Barcelona, Spain, Oct. 7-10, 2012. (2012)

188. "Nonlinear optical study of oxygen-sulfur squaraines", D. Peceli, H. Hu, S. Webster, D. Fishman, O. Przhonska,V. V. Kurkyukow, Y. L. Slominsky, A. D. Kachkovski, D. J. Hagan, E. W. Van Stryland, CLEO QELS 2012, San Jose, CA, paper JW4A.48 (2012)

189. "Nonlinear Spectra/Dispersion of Quinolinium Dyes Using Dual-Arm Z-scan", T. R. Ensley, H. Hu, Z. a. Li, S.-H. Jang, A. K. Y. Jen, D. J. Hagan, and E. W. Van Stryland, CLEO: QELS_Fundamental Science, OSA Technical Digest (online) (Optical Society of America, ), San Jose, CA, JW2A.47. (2013)

190. "Femtosecond Dual-Arm Z-Scan on Ceramic and Single Crystals of YAG", P. Samuel, H. Hu, T.R. Ensley, D. J. Hagan. E. W. Van Stryland and R. Gaume, Innovations in Glass Science and Technology. Glass and Optical Materials Division Meeting: SYMPOSIUM B: Glass Technology and Cross-Cutting Topics: Ultrafast spectroscopy techniques at The 10th Pacific Rim Conference on Ceramic and Glass Technology including GOMD - Glass & Optical Materials Division Annual Meeting, paper PACRIM10-SB-010-2013 San Diego (2013)

191. "Pulsed and CW IR detection in wide-gap semiconductors using extremely nondegenerate two-photon absorption", H. S. Pattanaik, D. A. Fishman, E. W. Van Stryland, and D. J. Hagan, CLEO: Science and Innovations, OSA Technical Digest (online) Optical Society of America, San Jose, California United States, CTu3E.3 (2013)

192. "Three-photon absorption of GaAs and other semiconductors", D. Pecelli, P. Olszak, C. Cirloganu, S. Webster, L. Padilha, T. Ensley, H. Hu, G. Nootz, D. Hagan, and E. W. Van Stryland, OSA

Topical Conference, Nonlinear Optics, Kohala Coast, Fairmont Hotel, Hawaii, talk NTu1B.6 (2013)

193. "Beam deflection for time-resolved measurment of nonlinear refraction", M. Fernandinus, H. Hu, M. Reichert, D. Hagan, and E. W. Van Stryland, OSA Topical Conference, Nonlinear Optics, Kohala Coast, Fairmont Hotel, Hawaii, talk NTu1B.2 (2013)

194. "Time-resolved doubly-stimulated two-photon emission in gallium arsenide", M. C. Reichert, B. Turnbull, D. J. Hagan, and E. W. Van Stryland, Frontiers in Optics , OSA Technical Digest (online) Optical Society of America, Orlando, Florida, LW5I.2 (2013)

195. "Scanning 3-D IR imaging with a GaN photodiode using nondegenerate two-photon absorption", H. S. Pattanaik, M. Reichert, H. Hu, D. J. Hagan, and E. W. Van Stryland, Frontiers in Optics , OSA Technical Digest (online) Optical Society of America, Orlando, Florida, FW6C.7 (2013)

196. "Nonlinear characterization of thin films by the Dual-Arm Z-scan Method", T. R. Ensley, H. Hu, J. M. Hales, H. Kim, J. W. Perry, A. R. Ernst, C. Fuentes-Hernandez, A. Dindar, B. Kippelen, D. J. Hagan, and E. W. Van Stryland, Frontiers in Optics , OSA Technical Digest (online) Optical Society of America, Orlando, Florida, FW1A.7 (2013)

197. "Beam deflection measurement of time and polarization resolved nonlinear refraction", M. R. Ferdinandus, H. Hu, M. Reichert, Z. Wang, D. J. Hagan, and E. W. Van Stryland, Frontiers in Optics , OSA Technical Digest (online) Optical Society of America, Orlando, Florida, FTh4C.2 (2013)

198. "Cw ir detection in wide-gap semiconductors using extremely nondegenerate two-photon absorption", H. S. Pattanaik, D. A. Fishman, E. W. Van Stryland, and D. J. Hagan, Frontiers in Optics , OSA Technical Digest (online) Optical Society of America, Orlando, Florida, FTh4C.3 (2013)

199. "Dispersion of the electronic third-order nonlinearity of symmetric molecules", H. Hu, T. R. Ensley, M. Seidel, M. Ferdinandus, M. Reichert, O. Przhonska, E. W. Van Stryland, and D. J. Hagan, CLEO: QELS, OSA Technical Digest (online), Optical Society of America, San Jose, CA, QM4E.1 (2013)

200. "Energy transfer within a donor-acceptor photochromic molecule", H. Hu, P. Zhao, R. Gvishi, G. Strum, A. Tal, S. Grinvald, G. Bar, L. Bekere, V. Lokshin, V. Khodorkovsky, M. Sigalov, D. J. Hagan, and E. W. Van Stryland, Frontiers in Optics , OSA Technical Digest (online) Optical Society of America, Orlando, Florida, FTh2C.4 (2013)

201. "Optimization of the Electronic Third-order Nonlinearity of Cyanine-like Molecules for All Optical Switching", H. Hu, T.R. Ensley, M. Reichert, M.R. Ferdinandus, D. Peceli, O.V. Przhonska, S.R. Marder, A. K-Y Jen, J.M. Hales, J.W. Perry, D.J. Hagan, & E.W. Van Stryland, Photonics West, San Francisco, Jan 2014. (2014)

202. "New Methods for Measuring Nonlinear Refraction: Beam Deflection and Dual-Arm Z-Scan", David J Hagan, Honghua Hu, Manuel R Ferdinandus, Trenton R Ensley, Matthew Reichert, Eric W Van Stryland, MRS Spring meeting, paper JJ7.02, San Francisco, April 2014. (2014)

203. “Extremely Nondegenerate Doubly-Stimulated Two-Photon Emission: Towards a Semiconductor Two-Photon Laser", Matthew Reichert, David J. Hagan and Eric W. Van Stryland, IEEE 24th International Semiconductor Laser conference, Palma de Mallorca, Spain, Sept. 7-10, 2014. (2014)

204. "Förster Resonance Energy Transfer within a Donor-Acceptor Composite Photochromic Molecule through One- and Two-Photon Absorption”, Peng Zhao, Honghua Hu, Raz Gvishi, Galit Strum,

Amir Tal,Shmuel Grinvald, Galit Bar, Laura Bekere, Vladimir Lokshin, Vladimir Khodorkovsky, Mark Sigalov, David J. Hagan, Eric W. Van Stryland, CLEO , OSA Technical Digest (online) (Optical Society of America, 2014), San Jose, June 2014. (2014)

205. "Beam Deflection Measurements of Transient Nonlinear Refraction from Coherent Rotational Revivals in Air”, Matthew Reichert, Peng Zhao, Jennifer M. Reed, Trenton R. Ensley, David J. Hagan, Eric W. Van Stryland, OSA FIO (Optical Society of America, 2014), Tucson, 2014. (2014)

206. “Measurement of Nonlinear Refraction Dynamics of CS2", Matthew Reichert, Honghua Hu, Manuel Ferdinandus, Marcus Seidel, Peng Zhao, Jennifer Reed, Dmitry Fishman, Scott Webster, David Hagan, and Eric Van Stryland, CLEO , OSA Technical Digest (online) (Optical Society of America, 2014), San Jose, June 2014. (2014)

207. “Spectroscopic Tools for Nonlinear Absorption and Refraction”, E.W. Van Stryland, M. Reichert, M.R. Ferdinandus, H. Hu, P. Zhao, J.M. Reed, T.R. Ensley, & D.J. Hagan, International Commission on Optics, ICO, Santiago de Compostella, Spain, August 2014. (2014)

208. "Nonlinear absorption and refraction spectroscopic tools", Eric W. Van Stryland, Honghua Hu, Trenton R. Ensley, Matthew C. Reichert, Manuel R. Ferdinandus, David J. Hagan, SPIE Optics & Photonics, 9181, San Diego, CA, Aug. 20-21, 2014. (2014)

209. "Advanced non-linear solid filter based on photochromism induced by 2-photon absorption of a dye-doped sol-gel disc", Raz Gvishi, Peng Zhao, Honghua Hu, Galit Strum, Amir Tal, Shmuel Grinvald, Galit Bar, Laura Bekere, Vladimir Lokshin, Vladimir Khodorkovsky, Mark Sigalov, David Hagan, Eric Van Stryland, SPIE Optics and Photonics 2014 meeting, San Diego, California, United States, Session: Light Manipulating Organic Materials and Devices (OP210), 2014. (2014)

210. "Experimental tool for nonlinear spectroscopy: absorption and refraction" , E. Van Stryland, T. Ensley, M. Reichert, D. Hagan, SPIE Laser Damage 2014, NIST, Boulder, CO, Sept 14-17 (2014)

211. David J. Hagan, Michael McKee and Bahaa E. Saleh, "Building a new Curriculum in Undergraduate Photonic Science and Engineering" ETOP 2015 / Education and Training in Optics and Photonics (29 June - 2 July 2015)

212. Matthew Reichert, David J. Hagan, Eric W. Van Stryland "Nondegenerate Three-Photon Absorption in GaAs" “Nondegenerate Three-Photon Absorption in GaAs”, Matthew Reichert, David J. Hagan, Eric W. Van Stryland, Nonlinear Optics, OSA Technical Digest (online) (Optical Society of America), Kauai, Hawaii, 2015.

213. Temporal dynamics of nonlinear absorption and refraction in crystalline and hydrogenated amorphous silicon Akbar Ali Syed, Matthew Reichert, Trenton R. Ensley, Jason Pelc, David J. Hagan, Eric W. Van Stryland, Nonlinear Optics, OSA Technical Digest (online) (Optical Society of America), Kauai, Hawaii, 2015.

214. P. Zhao, M. Reichert, T. Ensley, D.J. Hagan, E.W. Van Stryland, "Beam deflection measurements of nondegenerate nonlinear refractive indices in direct-gap semiconductors" CLEO, FW3D.7 2015

215. Himansu S. Pattanaik, Matthew Reichert, Jacob B. Khurgin, David J. Hagan, and Eric W. Van Stryland,"Extremely Nondegenerate Two-photon Absorption Enhancement in Quantum Well (QW) Semiconductors",Nonlinear Optics OSA Technical Digest (online) (Optical Society of America, 2015), paper NW4A.38, 2015

216. P. Zhao, M. Reichert, D.J. Hagan, E.W. Van Stryland,"Measurement of second hyperpolarizability and nuclear rotational response of gas-phase carbon disulfide",Nonlinear Optics, OSA Technical

Digest, NW4A.37, 2015 217. H. Hu, T.R. Ensley, M. Reichert, M.R. Ferdinandus, D. Peceli, O.V. Przhonska, S.R. Marder, A.

K-Y Jen, J.M. Hales, J.W. Perry, D.J. Hagan, & E.W. Van Stryland,"Optimization of the electronic third-order nonlinearity of cyanine-like molecules for all optical switching",Photonics West, San Francisco,2015

218. D.J. Hagan, P. Zhao, M. Reichert, E.W. Van Stryland, "Comparison of Second Hyperpolarizability in liquid and gas phases of Carbon Disulfide", Advanced Photonics, Novel Optical Materials and Applications (NOMA), paper NoW2D.2, Vancouver, British Columbia, Canada, “20 July 2016., (2016).

219. N. Kinsey, A.A. Syed, D. Courtwright, C. DeVault, C.E. Bonner, V.I. Gavrilenko, V.M. Shalaev, D.J. Hagan, E.W. Van Stryland; A. Boltasseva, "Effective Third-Order Nonlinearities in Refractory Plasmonic TiN Thin Films", CLEO, paper FW4A.4, San Jose, CA, June -5-10, (2016).

220. S. Tofighi, P. Zhao, M. Bondar, R. O'Donnell, J. Shi, D.J. Hagan, E.W. Van Stryland, "Electronic nature of new Ir (III)-complexes: Linear spectroscopic and nonlinear optical properties", OSA FIO, Rochester, NY, October, (2016).

221. P. Zhao, M. Reichert, D.J. Hagan, E.W. Van Stryland, "Measurement of Nonlinear Optical Response Functions of Common Organic Solvents", CLEO, paper JW2A.54, San Jose, CA, June -5-10, (2016).

222. P. Zhao, M. Reichert, D.J. Hagan, and E.W. Van Stryland, "Nondegenerate Nonlinear Refraction in Semiconductors", OSA FIO, Rochester, NY, October, (2016).

223. S. Benis, P. Zhao, H. S. Pattanaik, D. J. Hagan, and E. W. Van Stryland, "Time-Resolved Nonlinear Refraction of Indium Tin Oxide at Epsilon Near Zero," in Conference on Lasers and Electro-Optics, OSA Technical Digest (online) (Optical Society of America, 2017), paper FM2F.2.

224. S. Tofighi, H. S. Pattanaik, P. Zhao, M. V. Bondar, R. M. O’Donnell, J. Shi, D. J. Hagan, and E. W. Van Stryland, "Excited-state nonlinearities of Ir(III) complexes," in Conference on Lasers and Electro-Optics, OSA Technical Digest (online) (Optical Society of America, 2017), paper JTh2A.30.

225. N. Munera, P. Zhao, R. A. Herrera, D. J. Hagan, and E. W. Van Stryland, "Near-IR White Light Continuum for Broadband Z-Scan Nonlinear Spectroscopy," in Nonlinear Optics, OSA Technical Digest (online) (Optical Society of America, 2017), paper NTu1B.7.

226. S. Benis, P. Zhao, D. J. Hagan, and E. W. Van Stryland, "Nondegenerate, Transient Nonlinear Refraction of Indium Tin Oxide Excited at Epsilon-Near-Zero," in Nonlinear Optics, OSA Technical Digest (online) (Optical Society of America, 2017), paper NW1A.3.

227. N. Munera, P. Zhao, R. A. Herrera, D. J. Hagan, and E. W. Van Stryland, "Broadband Near Infrared Supercontinuum for Z-Scan Nonlinear Spectrometer," in Frontiers in Optics 2017, OSA Technical Digest (online) (Optical Society of America, 2017), paper JW3A.9.

228. P. Zhao, R. Gvishi, L. Bekere, V. Lokshin, V. Khodorkovsky, D. J. Hagan, and E. W. Van Stryland, "Transient Ring Opening and Closing of a Two-photon Photochromic Molecule Utilizing Energy Transfer," in Conference on Lasers and Electro-Optics, OSA Technical Digest (online) (Optical Society of America, 2017), paper SW1M.3.

229. J. M. Hales, S. Chi, T. Allen, S. Benis, N. Munera, J. W. Perry, D. McMorrow, D. J. Hagan, and E. W. Van Stryland, "Third-Order Nonlinear Optical Coefficients of Si and GaAs in the Near-

Infrared Spectral Region," in Conference on Lasers and Electro-Optics, OSA Terchnical Digest (online) (Optical Society of America, 2018), paper JTu2A.59.

230. S. Benis, D. J. Hagan, and E. W. Van Stryland, "Enhancement Mechanism of Nonlinear Optical Response of Transparent Conductive Oxides at Epsilon-Near-Zero," in Conference on Lasers and Electro-Optics, OSA Terchnical Digest (online) (Optical Society of America, 2018), paper FF2E.1.

231. J. M. Hales, S. Chi, T. Allen, S. Benis, N. Munera, J. W. Perry, D. McMorrow, D. J. Hagan, and E. W. Van Stryland, "Third-Order Nonlinear Optical Coefficients of Si and GaAs in the Near-Infrared Spectral Region," in Conference on Lasers and Electro-Optics, OSA Technical Digest (online) (Optical Society of America, 2018), paper JTu2A.59.

232. S. Tofighi, M. V. Bondar, R. M. O’Donnell, J. Shi, D. J. Hagan, and E. W. Van Stryland, "Ultra-fast relaxation and singlet-triplet conversion quantum yield of Ir complexes," in Frontiers in Optics / Laser Science, OSA Technical Digest (Optical Society of America, 2018), paper JTu3A.7.

233. S. Benis, N. Munera, D. J. Hagan, and E. W. Van Stryland, "Spectral and angular dependence of the giant nonlinear refraction of Indium Tin Oxide excited at epsilon-near-zero," in Conference on Lasers and Electro-Optics, OSA Technical Digest (Optical Society of America, 2019), paper FF3D.3.

234. S. Benis, N. Munera, E. W. Van Stryland, and D. J. Hagan, "Z-scan and beam-deflection measurements of Indium-Tin- Oxide at epsilon-near-zero," in Nonlinear Optics (NLO), OSA Technical Digest (Optical Society of America, 2019), paper NTu3B.2.

235. S. Tofighi, N. Munera, M. Gao, D. J. Hagan, and E. W. Van Stryland, "Beam Deflection Measurements of Transient Nonlinear Refraction in Air in the Mid-IR," in Nonlinear Optics (NLO), OSA Technical Digest (Optical Society of America, 2019), paper NM3A.3.

CONTRIBUTED:

1. "Continuous-Wave Degenerate Four-Wave Mixing in InSb", H.A. Mackenzie, D.J. Hagan and H.A. Al-Attar, National Symposium on Optical Phase Conjugation, Imperial College, London, (1984).

2. "Semiconductor Optical Limiters with Large Dynamic Range", D.J. Hagan, M.J. Soileau, Y.Y. Wu, and E.W Van Stryland, OSA Annual Meeting, Seattle, (1986).

3. "Temporal and Spatial Distribution of Light from a Monolithic Limiter", M.J. Soileau, D.J. Hagan, Y.Y. Wu and E.W. Van Stryland. Joint U.S.-British Conference on Sensor Protection, Malvern, England, (1987).

4. "Repetition-Rate Dependence of the Nonlinear Response of Suspended Particles", M.J. Soileau, K. Mansour, E.W. Van Stryland, E. Canto and D.J. Hagan, Joint U.S.-British Conference on Sensor Protection, Malvern, England, (1987).

5. "Ultrafast Phase Conjugation in Semiconductors", E. Canto, D.J. Hagan, E.W. Van Stryland, E. Miesak and M.J. Soileau, OSA Florida Quarterly Meeting, Orlando, FL, (1987).

6. "Self Protecting and Optical Power Limiters", D.J. Hagan, E.W. Van Stryland, Y.Y. WU, and M.J. Soileau, OSA Florida Quarterly Meeting, Melbourne, FL, (June 1987).

7. "Temporal and Spatial Response of Semiconductor Power Limiters", E.W. Van Stryland, M.J.Soileau, Y. Y. Wu, K. Mansour, and D.J. Hagan, Annual Meeting of the Optical Society of America, Rochester, NY, (1987).

8. "High Order Optical Nonlinearities in Semiconductors", E. Canto, J. Young, E. Miesak, E.W. Van Stryland, and D.J. Hagan, Annual Meeting of the Optical Society of America, Santa Clara, CA, (1988).

9. "Sensitive n2 Measurement and Relation of n2 to Two-Photon-Absorption", E.W. Van Stryland, M. Sheik-Bahae, D.J. Hagan, Gordon Conference on Nonlinear Optics and Lasers, July (1989).

10. "Optical Limiting in Semiconductors", Y.Y. Wu, D.J. Hagan, M.J, Soileau, and E.W. Van Stryland, 53rd Annual Meeting of the Florida Academy of Sciences, Jacksonville, FL, (March 30-April 1, 1989).

11. "Optical Limiting in Solutions of Metallo-phthalocyanines and Naphthalocyanines", D.R. Coulter, V.M. Miskowsky, J.W. Perry, T.H. Wei, E.W. Van Stryland, and D.J. Hagan, Proc. SPIE 1089, SPIE Technical Symposium, Orlando, Florida (1989).

12. "Passive Broadband High-Dynamic-Range Semiconductor Limiters", D.J. Hagan, E.W. Van Stryland, J. Young, T.H. Wei, M. Sheik-Bahae. A.A. Said, K. Mansour, and M.J. Soileau, Proc. SPIE 1089, SPIE Technical Symposium, Orlando, FL, (1989).

13. "Beam Distortion Due to Carrier Refraction in ZnSe at 532 nm", Y.Y. Wu, D,J. Hagan, E.W. Van Stryland and M.J. Soileau, OSA Annual Meeting, Orlando, FL, (1989).

14. "Z-Scan: A Simple Sensitive Technique for Measuring Refractive Nonlinearities", A.A. Said, M. Sheik-Bahae, T.H. Wei, J. Young, D.J. Hagan, M.J. Soileau and E.W. Van Stryland, OSA Annual Meeting, Orlando, FL, (1989).

15. "Characterization of Darkening in Semiconductor-Doped Glasses", J. Malhotra, D.J. Hagan and B.G. Potter, OSA Annual Meeting, Orlando, FL, (1989).

16. "Nonlinear Studies of Semiconductor-Doped Glasses", E. Canto, T.H. Wei, D.J. Hagan, E.W. Van Stryland and M.J. Soileau, OSA Annual Meeting, Orlando, FL, (1989).

17. "Z-Scan: A Simple and Sensitive Technique for Nonlinear Refraction Measurements", M. Sheik-Bahae, A.A. Said, T.H. Wei, Y.Y. Wu, D.J. Hagan, M.J. Soileau and E.W. Van Stryland, SPIE OE-LASE, San Diego, August (1989).

18. "Alternative Z-scan Geometries", A.A. Said, M. Sheik-Bahae, D.J. Hagan, and E.W. Van Stryland, OSA Annual Meeting, Boston, Mass., (1990).

19. "Kramers-Kronig Relation Between n2 and Two-Photon Absorption", M. Sheik-bahae, D.J. Hagan, A.A. Said, J. Young, T.H. Wei, and E.W. Van Stryland, SPIE meeting on Materials for Optical Switches, and Limiters II, Orlando, FL, (1990).

20. "Nonlinearities in Semiconductors for Optical Limiting", A.A.Said, M. Sheik-Bahae, D.J. Hagan, E. Canto, Y.Y. Wu, J. Young, T.H. Wei, and E.W. Van Stryland, SPIE meeting on Materials for Optical Switches, and Limiters II, Orlando, FL (1990).

21. "Sensitive Measurement of Anisotropy of Third Order Nonlinearities", J.R. DeSalvo, D.J. Hagan, M. Sheik-Bahae, and E.W Van Stryland, OSA Annual meeting, Boston, Mass., (1990).

22. "Nonlinear Absorption Studies in Metallophthalocyanines", T.H. Wei, M.J. Soileau, E.W. Van Stryland, D.J. Hagan, J.W. Perry, D.R. Coulter, and L.R. Khundkar, OSA Annual meeting, Boston, Mass.,(1990).

23. "Flashlamp Pumped Passively Modelocked Cr:LiSrAlF6 Laser", D.J. Hagan, T. Xia, K. Mansour, G.B. Gilchrist and B.H.T. Chai, OSA Annual Meeting San Jose, CA (1991).

24. "Measurement and Theory of Nondegenerate Bound Electronic Nonlinearities in Semiconductors", M. Sheik-Bahae, J. Wang, D.C. Hutchings, J.R. DeSalvo, A.A. Said, D.J. Hagan. and E.W. Van Stryland, OSA Annual Meeting, San Jose, CA (1991).

25. "Nonlinear Refraction from Cascaded Second Order Susceptibilities in KTP", R. DeSalvo, M. Sheik-Bahae, D.J. Hagan, E.W. Van Stryland and G.I. Stegeman, OSA Annual Meeting, San Jose, CA. (Nov, 1991)

26. "Self-focusing and optical damage in Cr:LiSAF and Cr:LiCAF" M. Richardson, M.J. Soileau, P. Beaud, R. DeSalvo, S. Garnov, D.J. Hagan, S. Klimentov, K. Richardson, M. Sheik-Bahae, A.A. Said, E. W. Van Stryland and B.H.T. Chai., SPIE Conference 1848, Los Angeles (1992)

27. Two-Color Time Resolved measurements of Optical Nonlinearities”, J. Wang*, A.A. Said*, D.J. Hagan, M. Sheik-Bahae and E.W. Van Stryland, Annual Meeting of the Optical Society of America, Albuquerque, NM, (1992).

28. “Measurement of the Dispersion of the Nonlinear Refractive Index in Wide-Gap Dielectric from the UV to the IR”, R. DeSalvo*, A.A. Said*, M. Sheik-Bahae, D.J. Hagan, and E.W. Van Stryland, Annual Meeting of the Optical Society of America, Albuquerque, NM, (1992).

29. “Improved Z-Scan Techniques for Ultrasensitive Measurements of Nonlinear Refraction and Absorption”, T. Xia*•, A.A. Said*, M. Sheik-Bahae, C.C. Wamsley**, D.J. Hagan, and E.W. Van Stryland, Annual Meeting of the Optical Society of America, Toronto, Canada, (1993).

30. “Optimization of Cascaded Optical Limiters”, D.J. Hagan, T. Xia*, A.A. Said*• and E.W. Van Stryland, Annual Meeting of the Optical Society of America, Toronto, Canada, (1993).

31. “Measurements of Optical Nonlinearities in Solutions of Phthalocyanines”, A.A. Said*, C.C. Wamsley**, D.J. Hagan, and E.W. Van Stryland, K. Mansour, D. Alvarez, S.M. Marder, and J.W. Perry, Annual Meeting of the Optical Society of America, Toronto, Canada (1993).

32. “Four-Wave-Mixing, Two-Photon Coherence, in Semiconductors”, M. Sheik-Bahae, J. Wang*, E.J. Canto-Said*, R. DeSalvo*, D.J. Hagan, and E.W. Van Stryland, Annual Meeting of the Optical Society of America, Toronto, Canada, (1993).

33. “RNB and its Isomorphs - A New Family of Nonlinear-Optical Materials”, J.F.H. Nicholls*•, B.H.T. Chai, D.J. Hagan, and B. Henderson, Annual Meeting of the Optical Society of America, Toronto, Canada, (1993).

34. “All-Optical Switching in KTP with Second Order Nonlinearities”, M. Sheik-Bahae, Z. Wang*•, D.J. Hagan, G. Stegeman, E.W. Van Stryland and G. Assanto, CLEO, Anaheim, CA, (1994).

35. “Measurement of the Nonlinear Absorption and Refraction Coefficients in CuCl”, A.A. Said, T. Xia*•, M. Sheik-Bahae, D.J. Hagan, and E.W. Van Stryland, Annual meeting of the Optical Society of America, Dallas, Texas (1994).

36. “Measurement of Optical Nonlinearities of Lead Phthalocyanines”, A. Dogariu•, T. Xia, A.A. Said, D.J. Hagan, E.W. Van Stryland, J.S. Shirk, and S.R. Flom, Annual meeting of the Optical Society of America, Dallas, Texas (1994).

37. “Nonlinear Beam Propagation in Thick Media”, T. Xia•, A.A. Said, M. Sheik-Bahae, D.J. Hagan, and E.W. Van Stryland, Annual meeting of the Optical Society of America, Dallas, Texas (1994).

38. “An Interactive, Computer-Based Teaching Laboratory System”, M. Bass, A. Vali**, D. J. Hagan and J. J. Brennan, Annual meeting of the Optical Society of America, Education Symposium, Portland Oregon (1995).

39. "Purely Refractive Transient Energy Transfer Via Stimulated Rayleigh Wing Scattering", A. Dogariu, T. Xia, D. Hagan, A. Said, E. Van Stryland, and N. Bloembergen, Annual meeting of the Optical Society of America, Portland, Oregon, 1995.

40. "Beam Propagation in Ultra-Thick Media and Its Applications to Optical Limiting", T. Xia, D. Hagan, and E. Van Stryland, Annual meeting of the Optical Society of America, Portland, Oregon, 1995.

41. "Picosecond to Nanosecond Nonlinear Optical Properties of Hexagonal and Supra-Cage Shaped Inorganic Clusters", T. Xia, A. Dogariu, A. Said, D. Hagan, E. Van Stryland, and Shu Shi, Annual meeting of the Optical Society of America, Portland, Oregon, 1995.

42. "Optimization of Graded and Stepped Optical Limiters", D.J. Hagan, S. Khodja, M. Decker, S. Yang, P. Suedmeyer, D. Kovsh and E. Van Stryland, Annual meeting of the Optical Society of America, Rochester, NY, 1996.

43. “Transistore opto-ottico nel vicino infrarosso in un cristallo di KTP mediante Generazione di Seconda Armonica”, Gaetano Assanto, Z. Wang, D. Hagan and E. Van Stryland, Proceedings of the 5th Convegno Nazionale Sulle Techiche Fotoniche Nelle Telecomunicazioni, Rome, Italy, 1997.

44. “Reverse Saturable Absorption In Polymethine Dyes”, S. Khodja, D.J. Hagan, J. Lim, S. Wang, D. Kovsh, and E. Van Stryland, O. Przhonska, SPIE Conference on Nonlinear Optical Liquids and Power Limiting, San Diego, July 1997.

45. “Measuring Nonlinear Spectra with a Visible, Picosecond Parametric Oscillator”, T.S. Ross and E. Van Stryland, Annual meeting of the Optical Society of America, Long Beach, CA, 1997.

46. “Photophysics and Nonlinear Absorption of Dye-Doped Polymeric Media”, J. Lim, O. Przhonska, D. Hagan, S. Khodja, E. Van Stryland, Annual meeting of the Optical Society of America, Long Beach, CA, 1997.

47. “Laser Beam Propagation through Nonlinear Media”, D. Kovsh, S. Yang, S. Khodja, D. Hagan, E. Van Stryland, Annual meeting of the Optical Society of America, Long Beach, CA, 1997.

48. “Enhancement of the Dynamic Range of Passive Optical Limiters by Optimization of Nonlinear Refraction”, S. Khodja, S. Yang, D. Kovsh, P. Suedmeyer, D. Hagan, E. Van Stryland, Annual meeting of the Optical Society of America, Long Beach, CA, 1997.

49. “Laser Beam Shape Variations Due to the Thermal-acoustic Effect in Absorbing Solutions”, S. Yang, D. Kovsh, E. Van Stryland, and D. Hagan, Florida Academy of Sciences meeting, Rollins College, Orlando, FL, March 27, 1998.

50. "Host Dependent Excited State Lifetime in Polymethine Guest-Host", Jin Hon Lim Olga Przhonska, D. Hagan, E. Van Stryland, Annual meeting of the Optical Society of America, Baltimore, 1998.

51. "Modeling of the Photoacoustic Effect Coupled with Nonlinear Absorption in Transient Regime", Dmitriy Kovsh, S. Yang, D. Hagan, E. Van Stryland, Annual meeting of the Optical Society of America, Baltimore, 1998.

52. "Femtosecond white light continuum for nonlinear index dispersion measurements", Raluca A. Negres, Ed Miesak, David Hagan, Eric W. Van Stryland, Annual meeting of the Optical Society of America, Baltimore, 1998.

53. "Microfabrication via Two-Photon Photoinitiated Polymerization", Kevin D. Belfield, X. Ren, D.J. Hagan, E. Van Stryland, V. Dubikovsky and E. Miesak, American Chemical Society, Fall meeting Polymer Materials Science and Engineering Division, New Orleans, 1999.

54. "Ultrafast Nonlinear Optical Spectrometer for Material Characterization", R. Negres, E. Van Stryland, D.J. Hagan, K. Belfield,and B. Reinhardt, American Physical Society Centenial meeting, Atlanta, Georgia, 1999.

55. F. E. Hernández, S. Yang, W. Shensky III, D. J. Hagan, and E. W. Van Stryland, “High dynamic range cascaded optical limiters”, SPIE Annua;l Meeting, 2000, San. Diego, CA, August 2000.

56. F. E. Hernández, S. Yang, W. Shensky III, E. W. Van Stryland and D. J. Hagan, “Hybrid optical limiter based on Pb-Phthalocyanine and CS2" OSA Annual Meeting, Providence, RI, October, 2000, paper MV3.

57. Kevin D. Belfield, David J. Hagan, Yong Liu, Raluca A. Negres, Meigong Fan, and F E. Hernandez, “Two-photon photochromism of a photorefractive organic material for holographic recording”, SPIE Annual Meeting, 2000, San. Diego, CA,. (August, 2000)

58. R. A. Negres, D. J. Hagan, E. W. Van Stryland and O. V. Przhonska, "Excited-State Absorption in polymethine and squarylium dyes in liquid and polymeric media." OSA Annual Meeting, Providence, RI, October, 2000, paper TuPP4.

59. E. V. Novikov, O. V. Przhonska, E. W. Van Stryland and D. J. Hagan, "Anisotropy decay kinetics of polymethins and squarylium dyes in liquid and polymeric media, OSA Annual Meeting, Providence, RI, October, 2000, paper ThDD3.

60. Microfabrication via Two-Photon Photoinitiated Polymerization”, Kevin D. Belfield, X. Ren, D. Hagan, E. Van Stryland, V. Dubikovsky and E. Miesak, American Chemical Society, Fall meeting Polymer Materials Science and Engineering Division, New Orleans, 1999.

61. “Ultrafast Nonlinear Optical Spectrometer for Material Characterization”, R. Negres, E. Van Stryland, D. Hagan, K. Belfield,and B. Reinhardt, American Physical Society Centennial meeting, Atlanta, Georgia, 1999.

62. “Microfabrication Via Two-Photon Photoinitiated Polymerization”, K. Belfield, X. Ren, D. Hagan, E. Van Stryland, V. Dubikovsky and E. Miesak, Fall meeting of the American Chemical Society, Polymer Materials Science and Engineering Division, New Orleans, 1999.

63. “Fluorene Derivatives with High Two-Photon Absorption Cross Sections: Synthesis and Nonlinear Optical Characterization”, Belfield, K. D.; Schafer, K. J.; Hagan, D. J.; Van Stryland, E. W.; Negres, R., American Chemical Society 2000 National Meeting, San Francisco, CA. , March 26-30, 2000.

64. “Relations between Molecular Structure and Two-Photon Absorption Spectra for a Series of Fluorene Derivatives”, Belfield, K. D.; Hagan, D. J.; Schafer, K. J.; Negres, R.; Mourad, W.; Van Stryland, E. W., 11th Inter-American Photochemical Society Winter Conference, Clearwater Beach, FL, Jan. 2-6, 2000.

65. “Novel Near-IR Two-Photon Absorbing Chromophores”, Belfield, K. D.; Schafer, K. J.; Reinhardt, B. A.; Hagan, D. J.; Van Stryland, E. W.; Negres, R., American Chemical Society 1999 National Meeting, New Orleans, LA, August 22-26, 1999.

66. “Measurements of two-photon and excited state apsorption spectra of organic molecules using femtosecond nonlinear spectroscopy”, Raluca Negres, Jinhong Lim, David J. Hagan, Eric W. Van Stryland, Kevin Belfield and Olga Przhonska, OSA Annual Meeting, paper WLL90, (Santa Clara, CA, 1999)

67. “Scaling Laws and Symmetry Dependence of Third-order nonlinearities in molecular wires and sheets”, U. Gubler, Ch. Bosshard, P. Gunther, R. Martin, R. Tykwinski, F. Diederich, R. Negres and D.J. Hagan, OSA Annual Meeting, paper WLL92, (Santa Clara, CA, 1999)

68. “Two-photon induced birefringence in azobenzene dyes”, C. R. Mendonça, F. E. Hernández, D. J. Hagan, and E. W. Van Stryland, OSA Annual meeting, Long Beach, Oct, 2001.

69. “Prediction and Observation of Excited-State Absorption Bands in Polymethine and Squarylium Molecules”, R. Negres, O. Przhonska, D. Hagan, E. Van Stryland, M. Bondar, L. Slominsky, A. Kachkovski, OSA Annual meeting, Long Beach, Oct, 2001.

70. “Carrier Dynamics and Internal Self-Action in CO2 Laser Beam Propagation Through InSb”, V. Dubikovsky, H. Shu, D. Hagan, E. Van Stryland, S. Guha, OSA Annual meeting, Long Beach, Oct, 2001.

71. “Picosecond Optical Limiting in Reverse Saturable Absorbers: Theoretical and Experimental Study”, A. Kobyakov, D. Hagan, E. Van Stryland, S. Lepkowicz, OSA Annual meeting, Long Beach, Oct, 2001.

72. “Effects of Temporal Walkoff in Pump-Probe Measurements of Two-Photon Absorbers”, J. Hales, R. Negres, A. Kobyakov, D. Hagan, E. Van Stryalnd, OSA Annual meeting, Long Beach, Oct, 2001.

73. “IR Propagation Experiments And Analysis in Insb”, V. Dubikovskiy, H. Shu, D. J. Hagan, E. W. Van Stryland, OSA Annual meeting, Orlando, FL 2002

74. “Reflection Z-scan Analysis and Experiment”, H. Shu, Florencio Hernandez, Vladislav Dubikovsky, D. J. Hagan, E. W. Van Stryland, OSA Annual meeting, Orlando, FL 2002

75. J. Hales, K. J. Schafer, A. M. Morales, K. D. Belfield, D. J. Hagan, and E. W. Van Stryland, "Nonlinear optical characterization for a set of fluorene push-pull chromophores," OSA Annual 2002, Orlando, FL.

76. W. Shensky III, F.E. Hernandez, I. Cohanoschi, E.W. Van Stryland, D. J. Hagan, "Carbon-black suspensions in CS2 as an effective broadband optical limiter", Optics in the Southeast (Oct. 2002), Huntsville, AL, USA.

77. W. Shensky III, F.E. Hernandez, I. Cohanoschi, E.W. Van Stryland, D. J. Hagan, "Cascaded-focus optical limiter using carbon-based suspensions connected by optical fiber", OSA annual meeting (Oct. 2002), Orlando, FL, USA.

78. “Measurement of nondegenerate two-photon absorption (2PA) spectrum of single-crystal polydiacetylene”, Jie Fu, Mihaela Balu, Joel M. Hales, David J. Hagan, Eric W. Van Stryland, Optics in the Southeast, Orlando, FL, November, 2003

79. “Nano- to femtosecond nonlinear spectroscopy of polymethine molecules for optical limiting applications” R.S. Lepkowicz, C.M. Cirloganu, O.V. Przhonska, J. Fu, I. Cohanoschi, D. J. Hagan, E. W. Van Stryland, M.V. Bondar, and Yu. L. Slominsky, Frontiers in Optics, Tucson, AZ, October, 2003

80. “Femtosecond to nanosecond characterization of the excited-state properties of polymethine molecules”, T.H. McMillian, R.S. Lepkowicz, J. Fua, C.M. Cirloganu, O.V. Przhonska, D. J.

Hagan, E. W. Van Stryland, M.V. Bondar, and Yu. L. Slominsky, Optics in the SouthEast . , Nov. 4-5, 2004.

81. “Picosecond characterization of two-photon absorption and excited state absorption in InSb in the 8-10 micron wavelength range”, C.M. Cirloganu , D. J. Hagan, and E. W. Van Stryland, Optics in the SouthEast, Nov. 4-5, 2004.

82. J. Fu, O. Przhonska, L. Padilha, S. Webster, D. Hagan, E. Van Stryland, M. Bondar, Y. Slominsky, and A. Kachkovski, "Two-Photon Absorption Studies of Polymethine, Squaraine and Tetraon Dyes," in Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America, 2006), paper FWK3.

83. P. Olszak, C. Cirloganu, S. Webster, D. Hagan, and E. Van Stryland, "Spectrum of Two-Photon Absorption in InSb," in Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America, 2006), paper JWD99.

84. “Two-Photon Absorption in Core-Shell and Core-Only Semiconductor Quantum-Dots” , G. Nootz, L.A. Padilha, D. J. Hagan, E. W. Van Stryland, Frontiers in Optics, OSA Annual Meeting, San Jose, October, 2007

85. S. Webster, L.A Padilha. H. Honghua, O.V. Przhonska, D.J. Hagan, E.W. Van Stryland, M.V. Bondar, I.G. Davydenko, Y.L. Slominsky, and A.D. Kachkovski, “Nonlinear characterization of near infrared Polymethine, Squaraine and Tetraone dyes” Lasers and Electro-Optics Society, 2007. LEOS 2007. The 20th Annual Meeting of the IEEE, 751 – 752 (2007).

86. “Three-photon absorption in semiconductors” Peter D. Olszak, Scott Webster, Lazaro A. Padilha, Milton Woodall, David J. Hagan, Eric W. Van Stryland, Frontiers in Optics, OSA Annual Meeting, San Jose, October, 2007

87. Invited – Keynote speaker/OSA travelling Lecturer: “An Introduction to Nonlinear Optics and its Application to Optical Limiting” David J Hagan, OSA Student Chapter Recife Symposium on Lasers and their Applications Recife, April 23, 2008

88. Invited – Keynote speaker/OSA travelling Lecturer: “Characterization of the NLO Response of Organics and Semiconductor Nanocrystals” David J Hagan, OSA Student Chapter Recife Symposium on Lasers and their Applications Recife, April 24, 2008

89. Invited: “An introduction to the characterization of Nonlinear Optical Materials” David J. Hagan, Erasmus Mundus Summer School in Photonics, Stockholm, June 30, 2008 KTH, Stockholm

90. Invited: “NLO Response of Organic molecules and Semiconductor Nanocrystals and their Application to Optical Limiting” David J. Hagan, Erasmus Mundus Summer School in Photonics, Stockholm, July 1, 2008 KTH, Stockholm.

91. Invited: “Two-photon absorption, nonlinear refraction and ultrafast carrier dynamics in II-VI quantum dots”, D. J. Hagan, G. Nootz, L.A. Padilha and E. W. Van Stryland, Laser-Optics 2008, June 28, 2008 , St. Petersburg, Russia.

92. Invited:“Nonlinear Transmission in Bulk and Nanostructured Materials from Infrared to Visible", David J. Hagan and Eric W. Van Stryland, Tri Services Information Exchange, Hilton Head, SC, April 14-15, 2008.

93. G. Nootz, L. Padilha, S. Webster, D. Hagan, E. Van Stryland, L. Levina, V. Sukhovatkin, and E. Sargent, "Evidence of Symmetry Breaking in Lead Salt Quantum Dots," in Nonlinear Optics: Materials, Fundamentals and Applications, OSA Technical Digest (CD) (Optical Society of America, 2009), paper NMA2.

94. E. Van Styrland, D. Hagan, S. Webster, L. Padilha, MJ Soileau, "Nonlinear optical spectroscopy: absorption and refraction", Boulder Damage Symposium, Boulder CO, (2009).

95. S. Webster, L. Padilha, O. Przhonska, D. Peceli, H. Hu, Y. Slominsky, A. Kachkovski, A. Tolmachov, V. Kurdyukov, D. Hagan, and E. Van Stryland, "Enhancement of Triplet Yields in Cyanine-Like Molecules," in Laser Science XXV, OSA Technical Digest (CD) (Optical Society of America, 2009), paper LSTuG2.

96. G. Nootz, L. Padilha, S. Webster, D. Hagan, E. Van Stryland, L. Levina, V. Sukhovatkin, and E. Sargent, "Size Dependence of Two-Photon Absorption in Lead Salt Quantum Dots," in Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America, 2009), paper FThS5.

97. C. Cirloganu, P. Olszak, L. Padilha, S. Webster, D. Hagan, and E. Van Stryland, "Three-photon Absorption In Semiconductors," in Laser Science, OSA Technical Digest (CD) (Optical Society of America, 2010), paper LTuG3.

98. G. Nootz, L. Padilha, S. Webster, D. Hagan, E. Van Stryland, L. Levina, V. Sukhovatkin, and E. Sargent, "Resonance Enhancement of the Two-Photon Absorption in PbS Quantum Dots," in Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America, 2010), paper FThO2.

99. T.R. Ensley, D.A. Fishman, S. Webster, D.J. Hagan, and E.W. Van Stryland, “Seeded Femtosecond Supercontinua in Various Media” Frontiers in Optics/Laser Science XXVII (FIO/LS), (2011).

100. H. Hu, D. Fishman, S. Webster, O.V. Przhonska, J.L. Bricks, A.D. Kachkovski, F. Terenziani, A. Painelli, S. He, D.J. Hagan, and E.W. Van Stryland, “Two-photon Absorption Spectra of a Near-IR Polymethine Molecule with a Broken Ground-State Symmetry” Frontiers in Optics/Laser Science XXVII (FIO/LS), (2011).

101. P. Samuel, T.R. Ensley, H. Hu, D.J. Hagan, E.W. Van Stryland, R. Gaume, "Nonlinear refractive index measurement on pure and Nd doped YAG ceramic by dual arm Z-scan technique" AIP Conference, Solid State Physics, 1665, 060010-1-3,2015

Research Funding and Other Grants Summary: $22,371,935 total amount of contracts and grants since coming to UCF as PI and Co-PI. My share of awards is $9,121,804. A detailed summary of awarded contracts is available on request.

DAVID J. HAGAN

Documents

Transcript of DAVID J. HAGAN