proceeding.pdf

Advances in Optics, Photonics, Spectroscopy and Applications

Editorial Board: NGUYEN VAN HIEU (Chairman)TRAN BA CHU, PHAM VAN HOI, NGUYEN DAI HUNG,

NGUYEN NGOC LONG, VU XUAN QUANG


Editorial Board: NGUYEN VAN HIEU (Chairman)

TRAN BA CHU, PHAM VAN HOI, NGUYEN DAI HUNG,

NGUYEN NGOC LONG, VU XUAN QUANG

Nhng tin b trong

Quang hc Quang t

Quang ph v ng dng

Hi ng bin tp: NGUYN VN HIU (Ch bin) TRN B CH, PHM VN HI, NGUYN I HNG,

NGUYN NGC LONG, V XUN QUANG

Nh xut bn Khoa hc k thut 2007

PROCEEDINGS o 4 th National Conference on Optics and Spectroscopy o 1 st Korea-Vietnam Joint Symposium on Quantum

Photonics and Nanophysics o International Workshop on Photonics and Applications ------------------------------------------------------------------------------------------------------------------------------------------------------------------


Can Tho, Vietnam August 15 - 19, 2006

K YU CC HI NGH

o Hi ngh Quang hc, Quang ph Ton quc ln th IV o Hi tho Hn-Vit v Quang t lng t &Vt l nan o Hi tho Quc t v Quang t v ng dng -------------------------------------------------------------

Nhng tin b trong Quang hc

Quang t Quang ph

v ng dng

Cn Th, Vit Nam 15-19 thng 8 nm 2006

PREFACE

The scientific meetings o 4 th National Conference on Optics and Spectroscopy o 1st Korea-Vietnam Joint Symposium on Quantum Photonics and Nanophysics o International Workshop on Photonics and Applications (IWPA-2006)

were successfully held in Can Tho, Vietnam from August 15 to 19, 2006. There were 258 participants in these meetings including the foreign scientists

from Korea, China, France, Germany, Italy, Japan, Malaysia, and Russia. These scientists from widely varying disciplines in physics, materials science, biology and chemistry came together to share their common interest in optics, photonics, spectroscopy and their applications. In the conferences, total 153 papers were presented in Plenary Sessions and 04 parallel sessions.

The Advances in Optics, Photonics, Spectroscopy and Applications have published the papers presented in these conferences and, in particular, they were selected by the editorial committee with a standard referee procedure. Among them 30 papers were selected for publication in the ASEAN Journal of Science and Technology for Development.

The successes of these conferences were due to the contribution from all the conference committees, sessions and the participants.

We sincerely thank the co-Sponsors. Specially, we would like to thank the conference secretariat and technicians

for their dedication and hard works.

Nguyen Van Hieu President Nguyen Van Den Co-Chairman of Local Organizing Committee Nguyen Dai Hung Co-Chairman of LOC Nguyen Ngoc Long Co-Chairman of LOC Vu Xuan Quang Co-Chairman of LOC Do Van Xe Co-Chairman of LOC

MC LC

Thng tin v hi ngh 10

Bo co khoa hc

TNH CHT QUANG HUNH QUANG CA VT LIU ZnO CU TRC NANO-TETRAPOD Ng Xun i, Nguyn Ngc Long, Nguyn Th Thc Hin, Trung tm Khoa hc Vt liu, Khoa Vt l, i hc Khoa hc T nhin, i hc QG H Ni

39

TNH CHT QUANG CA Zn1-xCoxO TNG HP BNG PHNG PHP THU NHIT Trnh Th Loan, Nguyn Ngc Long, L Hng H, Phng Th Hng, Khoa Vt l, Trng HKHTN - HQG - H Ni 334 - Nguyn Tri - H Ni

45

PREPARATION AND OPTICAL PROPERTIES OF Zn1-xMxO (M=Cr, Mn, Ni) Nguyen Minh Thuy, Do Thi Sam, Trinh Duc Thien, Phan Thanh Cong, Tran Minh Thi and Nguyen The Khoi, Faculty of Physics, Hanoi University of Education, Vietnam

51

NH HNG CA NANO TINH TH BN DN LN TNH CHT PHT QUANG, TNH CHT IN TRONG VT LIU T HP PVK/TiO2 Phm Duy Long, Xun Mai, ng Vn Thnh, Phan Vit Phong, Nguyn Nng nh, Vin Khoa hc Vt liu, Vin Khoa hc v Cng ngh Vit Nam, H Ni, Vit Nam

57

CU TRC V TNH CHT QUANG CA MNG MNG SnO2 : Sb C CH TO BNG PHNG PHP SOL-GEL Nguyn Thanh Bnh, L Duy Khnh, L Th Thanh Bnh, Nguyn Ngc Long, Khoa Vt l, i hc Khoa hc T nhin, HQGHN, H Ni

62

CH TO V NGHIN CU TNH CHT CA VT LIU ZnS:Cu, Al Th Sm, Nguyn Minh Thy v Nguyn Th Khi, Khoa Vt l, trng i hc S phm H Ni,136 Xun Thy, Cu Giy, H Ni

68

NH HNG CA PHNG PHP CH TO LN TNH CHT CA MNG ZnO:Al Nguyn Vn Hng, Lc Huy Hong, Danh Bch, Nguyn nh Lm, Nguyn S Phng, Nguyn Th Thanh H v Nguyn Th Khi, Trng i hc S phm H Ni 136 ng Xun Thu, Cu Giy, H Ni

74

CH TO MNG DN IN TRONG SUT SnO2 BNG PHNG PHP PHN X MAGNETRON PHN NG L Vn Ngc, Trn Tun, Hunh Thnh t , L Ti Hun,Trn Hu Hng, Phm Ngc Hin, Khoa Vt L, Trng i Hc Khoa Hc T Nhin, 227 Nguyn Vn C, Q.5, TP HCM

79

HUNH QUANG CA DY NANO SnO2 C CH TO BNG PHNG PHP BC BAY NHIT N GIN Nguyn Thanh Bnh, L Duy Khnh, L Th Thanh Bnh, Nguyn Ngc Long Khoa Vt l i hc Khoa hc T nhin HQGHN, H Ni

84

1

TNG HP FORSTERITE Mg2SiO4 pha Cr o Quc Hng, Phm Gia Ng Vin Ho hc, Vin Khoa hc v Cng ngh Vit Nam, 18 Hong Quc Vit, H Ni

90

CU TRC V TNH CHT QUANG CA MNG MNG ZnO CH TO BNG PHNG PHP SPIN COATING XUT PHT T SOL GEL Lng Tin Tng, Nguyn Th Khi, Nguyn Vn Hng, Lc Huy Hong, Nguyn Th Thu Hng v inh Th Phng Nga, Khoa Vt l, i hc S phm H ni

94

CH TO V THUC TNH HUNH QUANG CA VT LIU ZnO C CU TRC NANO NG PHNG PHP LNG NG HO HC PHA HI(MOCVD) V BC BAY NHIT Mn Hoi Nam, Tran Kim Anh, inh Xun Lc, Le Quoc Minh Vin Khoa hc Vt liu, Vin Khoa hc v Cng ngh Vit Nam, Cu Giy, H Ni

100

PHN TCH NG HC CA QU TRNH NHUM-TY MU MNG IN SC WO3 TRONG CU TRC WO3/ITO/THY TINH L vn Ngc, Trn Tun, Hunh Thnh t, Nguyn Vn n, Nguyn Ngc Thy Trang, Khoa vt l, Trng i Hc Khoa Hc T Nhin, HQG Tp HCM.

105

M HNH HA V M PHNG QU TRNH TO MNG Al2O3 BNG PHN X MAGNETRON Giang Vn Phc, L V Tun Hng, Nguyn Vn n, Hunh Thnh t i hc An Giang, Tnh An Giang

110

THIT K MNG CHNG PHN X BNG THUT GII DI TRUYN (GENETIC). L V Tun Hng, Nguyn Vn n , Hunh Thnh t Trng i Hc Khoa Hc T Nhin Tp HCM.

116

SO SNH LIU HP TH CA TLD-100 V MTS-N TRN KNH N TRN NHIT TI L PHN NG HT NHN LT- VIT NAM Bi Th Huy, Hunh Th Bo Chu, Nguyn Xun Hi, Phm nh Khang Phn vin Khoa hc Vt liu ti Nha Trang (Vin KH&CN Vit Nam)

122

NH HNG CA Fe LN PH PHT QUANG CA TINH TH ZnSe(Zn1-x FexSe: 0 x 0.1727) TRONG VNG NHN THY Phm Vn Bn, Khoa Vt l - Trng i hc Khoa hc t nhin - i hc Quc Gia H Ni, 334 Nguyn Tri, Thanh Xun, H Ni

127

KHO ST NH HNG CA NHIT LN CU TRC V TCH CHT CA MNG TiO2 V Th Hnh Thu, Nguyn Hu Ch, Trn Tun, L Vn Hiu, Nguyn Thanh Thy, inh Cng Trng B mn Vt l ng dng, i hc Khoa Hc T Nhin, H Quc Gia TP H Ch Minh

132

NGHIN CU CC TNH CHT QUANG CA VT LIU NHIT PHT QUANG NN LITHIUM BORATE Bi Th Huy, Hunh K Hnh, Tng Vn Tut, H XunVinh,Hunh Th Bo Chu, V Quc Vit, V Th Thu H, Phn vin Khoa hc Vt liu, Vin Khoa hc v Cng ngh Vit Nam, Nha Trang

137

CH TO, TNH CHT NHIT HUNH QUANG CA VT LIU Li2BB4O7 PHA TP KIM LOI Phan Tin Dng , Nguyn Th Thu Oanh, Ng Quang Thnh, T Quang Thao, V Xun Quang , Vin Khoa hc vt liu - Vin Khoa hc v Cng ngh Vit Nam

144

2

NATURAL RADIOACTIVITY IN SOME ANCIENT CERAMIC SAMPLES BY ALPHA COUNTING USING SCINTILLATION SCREEN ZnS:Ag Huynh Ky Hanh, Phan Tien Dung, Vu Quoc Viet,, Tong Van Tuat Institute of Materials Science-Nha trang Branch

148

NGHIN CU CH TO THY TINH SILICA PHA TP ION Cr3+ BNG PHNG PHP SOL-GEL V MT S KHO ST TNH CHT QUANG V Phi Tuyn, Nguyn Trng Thnh v Nguyn Thu Trang Vin Khoa hc Vt liu - Vin Khoa hc v Cng ngh Vit Nam

153

CH TO V NGHIN CU TNH CHT QUANG CA MNG MNG ORMOSIL V Th Thy Dng, Khc Quang t, Nghim Th H Lin, Nguyn Xun Ngha, Nguyn Tt Thnh, Trn Hng Nhung Vin Vt l v in t, Vin Khoa hc v Cng ngh Vit Nam, 10 o Tn, Ba nh, H Ni

159

NGHIN CU H VT LIU SPIN T Zn-Mn-O BNG PHNG PHP TN X RAMAN Nguyn Th Thy Liu, Phan Th Long, Nguyn Xun Ngha Hc vin Cng ngh Bu chnh - Vin thng, H Ni, Vit Nam,

165

TNH CHT NHIT IN V TNH CHT QUANG CA N TINH TH Bi1,8Sb0,2Te3,0 Ng Thu Hng, Khoa Vt l, Trng i hc Khoa hc T nhin, i hc Quc gia H ni.

171

S PH THUC CA CU TRC TINH TH V BIN HT CA La0.7Ca0.3MnO3 + 3%Al2O3 VO NHIT NUNG Phm Thanh Phong, Nguyn Vn Khim, Nguyn Xun Phc, Hng Manh, L Vn Hng, Phng Gio dc - o to huyn Ninh Ha, Khnh Ha

176

SOME PHYSICAL CHARACTERISTICS OF SILVER NANOCRYSTALLINE MATERIALS Le Thi Cat Tuong , Phan Vinh Phuc , Phan Thi Ngoc Bich Institute of Materials Science, VAST

182

NH HNG CA PHA TP Sr LN CU TRC V PH TN X RAMAN CA La2-xSrxNiO4 Trn ng Thnh, Nguyn Xun Ngha, Nguyn Vn Minh v L Vn Hng Vin Khoa hc Vt liu, VAST Vit Nam, 18 - Hong Quc Vit, H Ni

187

CH TO V NGHIN CU TNH CHT CA MNG MNG TiO2 V TiO2: Co+2 Danh Bch, Nguyn nh Hng, Nguyn Cao Khang, Lc Huy Hong v Nguyn Th Khi, Khoa Vt l, trng i hc S phm H Ni,136 Xun Thy, Cu Giy, H Ni

193

NGHIN CU V CH TO MNG QUANG XC TC TiO2 BNG PHNG PHP PHN X PHN NG MAGNETRON DC V Th Hnh Thu, Nguyn Hu Ch, Trn Tun, Vn Hng Khi, Nguyn Ch Tm, Phm Kim Ngc B mn Vt l ng dng, Trng i hc Khoa hc T nhin, H Quc gia TP HCh Minh

199

NGHIN CU PHNG PHP CH TO V MT S TNH CHT CA VT LIU NHIT PHT QUANG TRN NN LiF V Th Thi H, Nguyn Th Qu Hi v Nguyn Ngc Long Vin Khoa hc Vt liu - Vin Khoa hc v Cng ngh Vit Nam

204

CH TO CC CHM LNG T CdSe V CdTe T CdO ng Th Diu Thu, Trn Th Kim Chi, Phm Th Thu v Nguyn Quang Lim Vin Khoa hc Vt liu, Vin KH&CN Vit Nam,18 Hong Quc Vit, Cu Giy, H Ni

208

3

XC NH KCH THC CA CHM LNG T CdSe T PH RAMAN L B Hi, Nguyn Xun Ngha, V c Chnh, Phm Thu Nga Trng THPT chuyn L Qu n , Khnh Ha.

213

CH TO V NGHIN CU CU TRC CA NANOPHOSPHOR Y2O3 PHA TP ION Er3+, Tm3+ Nguyn V, L Th Ct Tng, Nguyn Hu Qun, Lm Th Kiu Giang, Trn Kim Anh, Vin Khoa hc Vt liu, Vin Khoa hc v Cng ngh Vit Nam, H Ni

219

NH HNG CA ION KIM LOI KIM N QU TRNH PHT QUANG CNG BC CA THCH ANH VIT NAM L Vn Thanh Sn, Trnh c Quang, V Xun Quang, Trn Th Hng, Nguyn Trng Thnh, Ng Quang Thnh, Trng HSP ai hc nng,

224

CU TRC V TNH CHT IN SC CA MNG VANADIUM OXIDE BC BAY CHN KHNG Trn Quang Hin, L Vn Hiu, Trn Th Thu Nhi, Nguyn c Ho, Nguyn Thanh Nht Quang, i hc Tin Giang

228

LIDAR APPLICATIONS FOR AIR QUALITY MONITORING: CASE OF AEROSOL CHARACTERISATION AND INDUSTRIAL SITE SURVEY OF GASEOUS LEAKS S. Geffroy, L. Ducharne and E. Frejafon INERIS, French institute for industrial and ambient risk assessment, France

234

PHOTONIC RESEARCH AND DEVELOPMENT IN UNIVERSITI TEKNOLOGY MALAYSIA Noriah Bidin Physics Department, Faculty of Science, Universiti Teknologi Malaysia

239

STUDY THE BEHAVIOR OF LASER PRODUCED GLASS PLASMA IN VARIABLE MAGNETIC FIELDS Noriah Bidin, Rabia Qindeel, Yaacob Mat Daud Physics Department, Faculty of Science, Universiti Teknologi Malaysia

242

THEORETICAL CALCULATION OF SCATTERING PARAMETERS OF SOME BIOLOGICAL TISSUES WHEN IRRADIATED BY LASER BEAMS OF WAVELENGTHS OF 780nm AND 940nm Trn Th Ngc Dung, Trn Minh Thi, Department of Biomedical Engineering Physics, Faculty of Applied Sciences,University of Technology Ho Chi Minh City National University.268 L Thng Kit, Q10, TP H Ch Minh

248

IMPROVEMENT OF THE LOCAL ERROR SPLIT-STEP FOURIER METHOD TO SOLVE THE NONLINEAR SCHRODINGER EQUATION T. N. Nguyen, T. Chartier, UMR CNRS 6082 FOTON, ENSSAT,6 rue de Kerampont, 22300 Lannion, France

254

NGHIN CU CU TRC PH V MT S C TRNG KHC CA LASER BN DN CNG SUT CAO DNG THANH C PACKAGING TI VIT NAM V Vn Lc, J. Bernard, Lng V Hi Nam, Trn Quc Tin,Phm Vn Trng, Phm Vn Bn, Vin Khoa hc Vt liu, Vin KH&CNVN

261

HIGH POWER 780 nm DFB LASER WITH 500 KHz LINEWIDTH T-P. Nguyen, A. Klehr, O. Brox, G. Erbert, and G. Trnkle, Ferdinand-Braun-Institut fuer Hoechstfrequenztechnik, Gustav-Kirchhoff-Strae 4, 12489 Berlin, Germany

267

CHEMICAL COMPOSITION OF POST-AGB STARS FROM HIGH RESOLUTION OPTICAL SPECTROSCOPY

273

4

Dinh Van Trung, Institute of Physics and Electronics, VAST, Thu Le, Ba Dinh, Hanoi,

SIMULATION OF LASER BEAM PROPAGATION IN BRAIN BY METHOD MONTE CARLO and ADVANTAGE OF LASER ACUPUNCTURE IN DRUG DETOXIFICATION Trn Th Ngc Dung, Trn Minh Thi, Department of Biomedical Engineering Physics, Faculty of Applied Sciences University of Technology Ho Chi Minh National University, 268 L Thng Kit, Q10, TP H Ch Minh

277

AN EMPIRICAL METHOD IN DETERMINATION OF OPTICAL PUMP PARAMETERS FOR FLASHLAMP-PUMPED ERBIUM GLASS LASER Tuan Ta Van and Khoi Giang Manh National Center for Technological Progress, 25 Le Thanh Tong, Hanoi, Vietnam

284

OPTICAL TECHNIQUES FOR THE INVESTIGATION OF DEFECTS IN HIGH POWER LASER DIODES Tran Quoc Tien and Jens W. Tomm Max-Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Germany

291

RANDOM LASER IN ZNO POWDER Nguyen The Binh, Nguyen Van Hao, Nguyen Thi Hang, Duong Vu Truong, Pham Van Thin, Hanoi University of Science, VNU, 334 Nguyen Trai Road, Thanh Xuan , Hanoi

298

PHT TRIN MT THIT B O TC THI DI CA XUNG LASER CC NGN C TN S LP LI CAO Quc Khnh, Nguyn Trng Ngha, on Hoi Sn, L Quang Phng v Nguyn i Hng, Trung tm in t hc lng t, Vin Vt l v in t, Vin KHCN Vit Nam, 10 ph o Tn, Ba nh, H Ni, Vit Nam

303

MT PHNG N CH TO NGUN XUNG GN NH CHO LASER RN KCH BNG N FLASH Giang Mnh Khi, T Vn Tun, Vin ng dng cng ngh(NACENTECH) - B KH v CN.

309

NGHIN CU PHT TRIN K THUT QUENCHING-CAVITY V NG DNG VO PHT KHNG KHO MODE CC XUNG LASER PIC-GIY on Hoi Sn, V Dng, Phm Hng Minh, Trnh nh Huy, inh Xun Khoa, Quang Ho v Nguyn i Hng, Trung tm in t hc lng t, Vin Vt l v in t, Vin KHCN Vit Nam, 10 o Tn. Ba nh, H Ni, Vit Nam

315

MNG SILC XP NHIU LP PHA TP ECBI S DNG TRONG CC LINH KIN QUANG T Bi Huy, Phm Vn Hi, Phm Thanh Bnh, Trn Th Chm, L Quang Huy v o Trn Cao, Vin Khoa hc Vt liu, Vin Khoa hc v Cng ngh Vit Nam, 18 ng Hong Quc Vit, qun Cu Giy, H Ni

321

NG DNG VI IU KHIN AVR N NH HOT NG CA MCH KHUCH I QUANG SI PHA TP ERBIUM H Xun Vinh, Phm Vn Hi, Trn th Chm, Nguyn Quc Tun, Vin Khoa Hc Vt Liu, Vin KH&CN Vit Nam

327

CH TO U D SI QUANG KCH THC NAN Ngc Chung, ng Quc Trung v Trn Th Tm Vin khoa hc Vt liu, Vin Khoa hc v Cng ngh Vit Nam

333

NGHIN CU BIN I V DCH CHUYN BC SNG TRN C S LASER DFB V SOA S DNG TRONG H THNG TIN QUANG N PHOTON Lng V Hi Nam, V Vn Lc, J. Bernard v Trn Th Phc, Vin Khoa hc Vt liu, Vin Khoa hc v Cng ngh Vit Nam

339

5

THIT K V CH TO CHIP CHIA (1x2) CNG SUT QUANG A MODE T VT LIU LAI HU C V C NANO ASZ Nguyn Tt Thnh, Nguyn Thanh Bnh, Nguyn Thanh Hng, Dng Thnh Trung, Phan Vit Phong, V Th Nghim, V Don Min, Lm Th Kiu Giang, L Quc Minh, Khoa hc Vt liu, Vin Khoa hc v Cng ngh Vit nam

344

THIT B QUAN ST NH NHIT DNG LASER CO2 LM NGUN CHIU X Phm Trng Hin, Trn B Ch, Hong c Mnh, L Trng Thip Trung tm KHKT-CNQS, B Quc phng, 17 Hong Sm, Cu Giy, H Ni

350

THE STOKES LASER WITH DIFFERENT PUMP POWERS Le MinhTuan, Chu Van Lanh, Ho Quang Quy, University of Vinh

356

INFLUENCE OF INTRACAVITY NONLINEAR EFFECTS ON LASER BEAMS STRUCTURE Ho Quang Quy, Tran Ba Chua, Mai Luu, Tran Ngoc Truoi Institute for Applied Physics-MISTT

361

LP BIN QUANG TRONG MI TRNG HNH NG L Th Qunh Anh, Nguyn Vn n, Tn Tht Qu, Nguyn Thanh Nht Quang Khoa Vt L, Trng i Hc Khoa Hc T Nhin, Nguyn Vn C, Qun 5, TP HCM

367

FT-IR, FT-RAMAN SPECTRA AND AB INITIO-RHF, DFT-B3LYP CALCULATIONS OF URIC ACID IN SOLID PHASE Nguyen Hoang Truc, Le Van Truc, Huynh Thanh Dat, Nguyen Van Den Pedagogical University of HCMC

371

XC NH MT S LOI KEO RONG BIN BNG PHNG PHP QUANG PH HNG NGOI (FT-IR), RAMAN (FT-RAMAN) VCNG HNG T HT NHN (13C NMR) Trn Th Thanh Vn, V Mai Nh Hiu v Bi Minh L Phn vin Khoa hc Vt liu ti Nha Trang, Vin Khoa hc v Cng ngh Vit Nam

378

NGHIN CU PHN TCH LIN TC DNG ASEN BNG K THUT GHP NI SC K CP ION VI QUANG PH HP TH NGUYN T Nguyn nh Thut, Bi Minh L, Ng Quc Bu, L Lan Anh Phn vin Khoa hc Vt liu ti Nha Trang - Vin KH v CN Vit Nam

383

DESIGN AND CONSTRUCTION OF 3D COMPUTER Pham Hoang Minh, Nguyen Duc Thanh, Pham Hong Duong Cooperman Laboratory, Institute of Material Sciences,VAST

389

CC C TRNG QUANG HC V O LIU NHIT PHT QUANG CA VT LIU Li2B B4O7:Cu Ng Quang Thnh, Nguyn Trng Thnh, V Xun Quang, Nguyn Th Khi Trng CSP Yn Bi

394

C TRNG NHIT PHT QUANG CA LIU K CaSO4 :Dy DNG VIN NN DNG TRONG O LIU BC X L Vn Tut, Nguyn Vn To, Nguyn Vn Su, Ng Quang Thnh Khoa Vt L, Trng i hc Khoa hc Hu,

400

NGHIN CU, THIT K, CH TO B KHNG CH NHIT CAO CHO H TO MU BT PHT QUANG ZnS: Mn BNG PHNG PHP GM VI CNG SUT TIU TH IN NH Nguyn Duy Tin, Phm Vn Bn, Trung tm Cng ngh Vi in t v Tin hc - Vin ng dng CN- B KH&CN C6, Thanh Xun Bc, Thanh Xun, H ni

406

6

MT S KT QU O TUI NHIT HUNH QUANG MU GM DI CH G THP (NG THP) Nguyn Quang Min, Bi Vn Lot, Vin Kho c hc, 61 Phan Chu Trinh, H Ni

412

MT S KT QU M PHNG S LAN TRUYN BC X LASER C BC SNG KHC NHAU TRONG CC MI TRNG XON KH C MT V PHN B KCH THC KHC NHAU Phm V Thnh, Trn Th Phc, on Tng Anh Trung tm Khoa hc K thut v Cng ngh Qun s, 17 Hong Sm, H Ni

418

LASER BN DN NG DNG TRONG NGHIN CU MI TRNG XON KH V MT S KT QU T C Trn Th Phc, V Vn Lc, H Cng Nguyn, Lng V Hi Nam Trung tm Khoa hc K thut v Cng ngh Qun s,17 Hong Sm - Cu Giy - H Ni

424

NGHIN CU TNH CHT SUY GIM CNG LASER Bi Th Thanh Lan, Chu nh Thy, L Hng KhimTrng i hc M-a cht, ng Ngc, T Lim, H Ni

430

M PHNG V KHO ST ALBEDO QUANG HC M BNG PHNG PHP MONTE CARLO

HuKhoa Khoa hc ng dng, trng i hc Bch khoa, HQG TP.HCM

435

P DNG PHNG PHP M PHNG MONTE CARLO XC NH C TNH QUANG CA MU NC Nguyn Tun Anh, ng Xun C Trung tm Quang in t, Vin ng dng Cng ngh, 25 L Thnh Tng, H Ni

442

THIT B LASER BN DN A KNH BC SNG 650nm V NG DNG IU TR CHA LNH VT THNG TI BNH VIN TQ 108 H NI

L HiCng ty L Hip TP HCM

447

BUILDING A LASER PUMPED-FLUORESCENCE SPECTROMETRY SYSTEM BASED ON SPECTROGRAPH GDM-1000 Nguyen The Binh,Nguyen Anh Tuan, Nguyen Van Hao, Duong Vu Truong Hanoi University of Science, VNU, Nguyen Trai Road, Thanh Xuan , Hanoi

454

XC NH BC SNG LASER S DNG CU HNH LITTROW Quang Ha, V Dng, ng c Mnh, Totaro Imasaka Phng Photonics phn t, Vin Vt l v in t, Vin Khoa hc v Cng ngh Vit Nam

459

PHASE-SPACE TOMOGRAPHY: PHNG PHP DNG THU NHN THNG TIN T TRNG SNG KT HP MT PHN V Trng Ngha, C.Q. Trn, Trn Quang Trung, K.A. Nugent Khoa Vt L, Trng i Hc Khoa Hc T Nhin, Tp H Ch Minh, Vit Nam

464

NG DNG M HNH KUBELKA-MUNK TRONG IN OFFSET inh Sn Thch, Nuyn Trng Khoa Phng Th Nghim Cng Ngh Nano i Hc Quc Gia Tp. H Ch Minh

470

VN DY- HC MN QUANG PH I VI SINH VIN NGNH S PHM VT L NG BNG SNG CU LONG Nguyn th Thu Thy, Nguyn Hng Nhung, L Thanh Bnh

Khoa S phm, i hc Cn Th

476

THIT K CH TO MT S B TH NGHIM PHN QUANG HNH V C 482

7

nh Quang Linh, Hu nh Th Thu Thu , Tr ng Th Minh Uyn

p Tuy n, L Ph c Lm, Nguy n Tr ng L u, Nguy n Th Ph ng Chi

HC CHNG TRNH VT L THPT Nguyn Mnh Tho, Ng Mai Thanh, Phm Hng Hng, ng Th Thu Nga, Khoa Vt l, Trng i hc S phm H ni, 136 Xun Thy, Cu Giy, H Ni

MT B KIT LASER RN PHC V CHO O TO V NGHIN CU QUANG T V LASER TRNG I HC Quc Khnh, Nguyn Trng Ngha, Trnh nh Huy, Phm Long, Philippe Brechignac, Nguyn Th Bnh, Nguyn i Hng, Trung tm in t hc, Vin Vt l v in t, Vin Khoa hc v Cng ngh Vit Nam

488

THIT LP PHNG TH NGHIM QUANG - PHN X O Nguyn Th Ngc H, Trng Kim Hiu, Trn Duy Ho i hc KHTN, 227 Nguyn Vn C Q.5,Tp.HCM

494

M PHNG V PHN GII PHA PH QUANG PHN X CA BN DNGaAs, InP V CU TRC A LP D TH AlxGa1-xAs/GaAs/GaAs Phm Thanh Tm, Trng Kim Hiu, Nguyn Th Ngc H i hc Khoa hc T nhin, 227 Nguyn Vn C ,Qun 5, Tp.HCM.

500

NGHI CU PH QUANG PHN X V QUANG PHT QUANG CU TRC A LP D TH Ga1-xAlxAs/GaAs/GaAs Hunh Sa Hong, Trng Kim hiu, L Hng V, Vng Trung Kin Trng i hc Khoa hc T nhin TPHCM, 227 Nguyn Vn C Qun 5 TPHCM

506

BISTABILITY OF ALTERNATING NANO-LAYERS OF NONLINEAR MATERIALS Vu goc Sau, Vo Dinh Hoa, Ho Quang Quy, Nguyen Thi Thanh Tam Department of Technologies-University of Vinh

512

THE BISTABILITY OF FABRY-PEROT ETALON EMBEDDED DICLOROETHANE Ho Quang Quy, Tran Ba Chu, Nguyen Van Hoa Institute for Applied Physics- MISTT-HoangSam-HaNoi

516

KHI PHC THIT B LASER CO2 Y T, THC NGHIM V KH NNG NG DNG Hong c Mnh, V Hu Khnh Phn vin Vt l k thut/ 17 ph Hong Sm - Ngha - Cu Giy - H Ni

520

NGHIN CU THIT K H QUANG HC THAY I TRNG NHN CHO CC THIT B NH NHIT VNG PH 8-12m ng Ngc Sn, Trn Th Anh, Nguyn c Thng Phn vin VLKT, Vin T-VT, Trung tm KHKT & CNQS

526

NGHIN CU L THUYT HIN TNG XUYN KNH TRN C S BA NG DN SNG PHNG A MODE inh Vn Hong, Mai Hng Hnh H Khoa Hc T Nhin - H Quc Gia H Ni.

532

NG DNG LASER PHU THUT THM M TI BNH VIN TRUNG NG QUN I 108:NHNG KT QU MI V TRIN VNG Nguyn Th Hng, Phm Hu Ngh, Thin Dn, L Hu Minh, L Huy Tun, Phm Long, Bnh vin Trung ng Qun i 108, H Ni.

538

TNH TON CNG SUT BC X UV CA N HUNH QUANG Trn Th Thanh Vn, L Vn Hiu, V Hong Nam Khoa Vt l Trng i hc Khoa hc T nhin Thnh ph H Ch Minh, 227 Nguyn Vn C, Qun 5, Thnh ph H Ch Minh

544

8

Organizers

Vietnamese Physical Society

Korean Physical Society

Optical & Spectroscopic Society of Vietnam

Institute of Physics and Electronics (VAST)

University of Can Tho

College of Natural Sciences (Ho Chi Minh, VNU)

Institute of Material Sciences (VAST)

College of Technology (Hanoi, VNU)

.

Sponsors

Vietnamese Physical Society

Korean Physical Society

Vietnamese Ministry of Science and Technology

Vietnamese Academy of Science and Technology

International Centre for Theoretical Physics (ICTP, Italy)

Asia Pacific Center for Theoretical Physics

Institute of Physics and Electronics (VAST)

Institute of Material Sciences (VAST)

University of Can Tho

College of Natural Sciences (Ho Chi Minh, VNU)

9

Conference Topics

Quantum Photonics

Photonics Materials and Devices

Optoelectronics and Integrated Optics

Advanced Laser Light Sources

Nonlinear Optics

Nanophysics

Spectroscopy of Nano and Photonic Materials

Applications of Optics and Photonics...

International Scientific Advisors

C.O. Kim (Korean Physical Society)

Catherine Brechignac (CNRS France)

Denardo Gallieno (ICTP. Italy)

Program Committee

Nguyen Van Hieu (VPS, VAST, Vietnam)

Brechignac Philippe (Universite de Paris-11, France)

Young Pak Lee (Korean Physical Society)

Nguyen Van Den (VNU Ho Chi Minh)

Nguyen Dai Hung (IPE, VAST)

Nguyen Ngoc Long (VNU Hanoi)

Vu Xuan Quang (IMS, VAST)

10

Local Organizing Committee

Vu Xuan Quang (IMS, VAST) Co-Chairman Nguyen Van Den (VNU Ho Chi Minh) Co-Chairman Do Van Xe (University of CanTho) Co-Chairman Nguyen Dai Hung (IPE, VAST) Co-Chairman

Le Phuoc Loc (University of Cantho) Nguyen Huu Khanh (University of Cantho) Nguyen Thi Thu Thuy (University of Cantho) Huynh Thanh Dat (VNU Ho Chi Minh) Le Khac Binh (College Nat. Sciences Ho Chi Minh) Duong Ai Phuong (College Nat. Sciences Ho Chi Minh) Tran Tuan (College Nat. Sciences Ho Chi Minh) Cao Minh Thi (VPS Ho Chi Minh) Le Hiep Tuyen (College Technology HCM) Vu Thi Bich (IPE, VAST) Tran Hong Nhung (IPE, VAST) Chu Dinh Thuy (IPE, VAST) Hoang Xuan Nguyen (IPE, VAST) Tran Kim Anh (IMS, VAST) Pham Van Hoi (IMS, VAST) Nguyen Quang Liem (IMS, VAST) Pham Thu Nga (IMS, VAST) Do Xuan Thanh (IMS, VAST) Ngo Quoc Buu (Nha Trang IMS, VAST) Tran Ba Chu (MCSET) Nguyen The Binh (College of Nat. Sciences Ha Noi) Trinh Dinh Chien (College of Nat. Sciences Ha Noi) Nguyen Thuc Hien (College of Nat. Sciences Ha Noi) Nguyen Ngoc Long (College of Nat. Sciences Ha Noi) Tran Thi Tam (College of Technology Ha Noi) Luc Huy Hoang (Pedagogic College, Ha Noi) Nguyen The Khoi (Pedagogic College, Ha Noi) Trinh Duc Quang (University of Hue) Nguyen Tho Vuong (University of Hue) Dinh Xuan Khoa (University of Vinh) Dang Xuan Cu (Nacentech, MST) Le Dinh Nguyen (Nacentech, MST) Ta Van Tuan (Nacentech, MST) Vu Thi Kim Lien (University of Thai Nguyen) Pham Thanh Huy (University of Technology Ha Noi)

11

Invited speakers

Nguyen Van Hieu (VAST, Vietnam) Young PaK Lee (Hanyang University, Korea) Philippe Brechignac (Uni. Paris-11, France)

Phan Hong Khoi (VAST, Vietnam) M.A. Ferdenant (RAS, Russia)

Le Van Hong (IMS, VAST, Vietnam) Young Dong Kim (Kyung Hee University, Korea)

Nguyen Xuan Phuc (IMS, VAST Vietnam) Chang Kwon Hwangbo (Inha University (Korea)

Nguyen Quang Liem (IMS, VAST Vietnam) Tchang-Uh Nahm (Hanyang University, Korea)

Nguyen Ngoc Long (VNU Hanoi, Vietnam) Tae Eun Kim (Korea University)

Nguyen Nang Dinh (College of Technology Hanoi) Francois Puizzi (CEA, CNRS France)

Nguyen Dai Hung (IPE, VAST, Vietnam) Doseok Kim (Sogang University, Korea)

Vu Xuan Quang (IMS, VAST) Emeric Frejafon (INERIS, France)

Tran Hoang Hai (IPE Ho Chi Minh, VAST) Joo Yull Rhee (Sungkyunkwan University, Korea)

Nguyen Van Den (VNU Ho Chi Minh) Q-Han Park (Korea University)

Le Khac Binh (VNU Ho Chi Minh) Pham Van Hoi (IMS, VAST)

Chul-Sik Kee (Gwangju Institute of Science and Technology) Nguyen The Binh (VNU Hanoi)

Tran Thi Tam (College of Technology Hanoi) Noriah Bidin (University of Technology Malaysia)

Nguyen The Khoi (VNU Hanoi) Pham Thu Nga (IMS,VAST)

Feron Patrice (ENSSAT. France) Tran Kim Anh (IMS, VAST)

W.Tomm (MBI, Berlin, Germany) Vu Van Luc (IMS, VAST)

Conference Secretariat

Prof. Dr. Vu Thi Bich (E-mail: [email protected])

Conference E-mail:

[email protected]; [email protected]

Corresponding address:

Institute of Physics and Electronics 10 Dao Tan Street. Ba Dinh, Hanoi, Vietnam Tel: (84 4) 8363 490; Fax: (84 4) 7669 050

12

PLENARY SESSION PROGRAM

Tuesday - August 15, 2006

08: 00 - 09: 00 Registration

09: 00 - 09: 20 Official Opening

Opening Speech by Prof. Acad. Nguyen Van Hieu (Honour President of the Vietnamese Physical Society)

Keynote Address by Prof. Dr. Chae Ok Kim (President Korean Physical Society)

Welcoming Speech by Prof. Do Van Xe (President University of Cantho)

09: 20 - 09: 30 Coffee Break

Chairperson: Prof. Nguyen Ngoc Long (VNU Hanoi)

09: 30 - 10: 00 SPIN-PHOTONIC SCIENCE, COMPRISING SPIN-PHOTONIC

CRYSTALS, FOR ADVANDCE IT AND NT Young Pak Lee (Hanyang University, Korea)

10: 00 - 10: 30 SPIN-POLARIZED PHOTOCURRENT THROUGH QUANTUM

DOT PHOTODETECTOR Nguyen Van Hieu and Nguyen Bich Ha (VAST, Vietnam)

10: 30 - 11: 00 PHYSICAL AND CHEMICAL INDENTIFICATION OF

MANUFACTURED NANOPARTICLES IN AMBIENT

ATMOSPHERE USING LASER-INDUCED BREAKDOWN

SPECTROSCOPY (LIBS) TECHNIQUE Emeric Frejafon, T. Amodeo, M Baudelet, M. Attoui, O.Le Bihan, J. Yu

(INERIS, France)

11: 00 - 11: 20 SOLID - STATE LIGHTING: TECHNIQUES, MATERIALS AND

ITS FUTURE Nguyen Quang Liem, Do Xuan Thanh, Tran thi Kim Chi, U T. Dieu Thuy,

Nguyen Vu et al. (IMS, VAST, Vietnam)

11:20 11:40 SYNTHESIS AND PHOTOLUMINESCENCE STUDIES ON ZINC OXIDE NANOWIRES

Nguyen Ngoc Long, Ngo Xuan Dai, Nguyen Th Thuc Hien (VNU, Hanoi, Vietnam)

Buffet Lunch

13

SESSION A1: QUANTUM PHOTONICS AND NANOPHYSICS

First Korea- Vietnam Joint Symposium An External Activity of APCTP

August 15, 2006 (Tuesday)

Chairperson: Prof. Vu Xuan Quang (IMS, VAST)

(A1-01)

13: 30 14:00 APPLICATION OF CARBON NANOTUBES IN NANO ELECTROPLATING AND NANOCOMPOSITE MATERIALS

(Inivited talk)

Phan Hong Khoi, Nguyen Ngoc Minh (IMS, VAST Vietnam)

(A1-02)

14: 00 14:30 ANALYSIS ON THE INTERFACE EFFECT OF ZnSe/CdSe MULTILAYER SYSTEM

(Invited talk)

Young Dong Kim (Kyung Hee University, Korea)

(A1-03)

14: 30 15: 00 Co CLUSTER FORMATION IN TiO2 DMS AND A METHOD OF ESTIMATION

(Inivited talk)

Le Van Hong, Ngo Thi Hong Le, Nguyen Chi Thuan, Nguyen Van

Dai and Nguyen Xuan Phuc (IMS, VAST Vietnam)

15: 00 15: 15 Coffee break

Chairperson: Prof. Nguyen Ngoc Long (VNU Hanoi)

(A1-04)

15: 15 15: 45 OPTICAL AND STRUCTURAL PROPERTIES OF OPTICAL THIN FILMS WITH VARIOUS COLUMNAR

MICROSTRUCTURE

(Invited talk)

Chang Kwon Hwangbo (Inha University, Korea)

(A1-05)

15: 45 16: 15 LUMINESCENCE AND ENERGY TRANSFER OF Y2O3 NANOCOLLOIDAL CONTAINING RARE EARTH IONS

(Invited talk)

Tran Kim Anh, Lam Thi Kieu Giang, Nguyen Vu, Tran Thi Kim Chi, Man Hoai Nam et al. (IMS, VAST Vietnam)

14

(A1-06)

16: 15 16: 45 MAGNETIC-OPTICS PROPERTIES AND OXIDATION/REDUCTION OF ULTRATHIN MAGNETIC

FILMS: Fe FILMS ON Pt(111)

(Invited talk)

Tchang Uh Nahm (Hanyang University, Korea)

(A1-07)

16: 45 17: 15 MANGETO-OPTICAL PROPERTIES OF EXCITONS CONFINED TO SINGLE MAGNETIC AND NON-

MAGNETIC QUANTUM DOTS

(Invited talk)

Thang Ba Hoang, S. Mackowski, H. E. Jackson, L. M. Smith, P.

Wojnar, G. Karczewski, J. Kossut

August 16, 2006 (Wednesday)

Chairperson: Prof. Le Van Hong (IMS, VAST)

(A1-08) 08: 00 08: 30 FAST MOTION OF THE SURFACE MOLECULES

DEDUCED FROM THE SUM-FREQUENCY VIBRATIONAL

SPECTROSCOPY

(invited talk)

Doseok Kim (Sogan University, Korea)

(A1-09)

08: 30 09: 00 ENSEMBLE PARTICLE PHOTOPHYSICAL PROPERTIES (TWO-PHOTON EXCITATION, FRET, LIFETIME,

SPECTRAL CONVERTION) OF COMMERCIAL QUANTUM

DOTS IN SOLUTION AND IN LIVE CELLS

(Invited talk)

Tran Hong Nhung, Tong Kim Thuan, Jean-Claude Brochon, P. Thu

Nga, Khuc Mai Thu, Tran Thanh Thuy, Nguyen Xuan Nghia P.

Hong Duong, E. Guiot, P. Tauc (IPE, VAST Vietnam)

(A1-10)

09: 00 09: 30 PECULIAR OPTICAL PROPERTIES OF CO2MnGa ALLOYS

(invited talk)

Joo Yull Rhee (Sungkyunkwan University, Korea)

(A1-11)

09: 30 10: 00 PHOTOCHEMICAL SOLAR CELLS BASED ON NANOCRYSTALLINE TiO2 AND SnO2

(Invited talk)

Nguyen Nang Dinh (College of Technology Ha Noi)

10: 00 10: 15 Coffee Break

15

Chairperson: Dr. Phan Ngoc Minh (IMS, VAST)

(A1-12)

10: 15 10: 45 TUNNELING RESONANCE IN NANO-OPTICS

(invited talk)

Q-Han Park (Korea University, Korea)

(A1-13)

10: 45 11: 15 HIGH-CONCENTRATION Er+3- DOPED ALUMINOSILICATE GLASS TOROIDAL MICROCAVITY

LASERS: FABRICATION AND OPTICAL PROPERTIES

(Invited talk)

Pham Van Hoi, Ha Xuan Vinh, Chu Th Thu Ha, Phm Thu Nga, Nguyen Thu Trang, Bui Van Thien (IMS,VAST Vietnam)

(A1-14)

11: 15 11: 45 THE EFFECT OF SiOX INTERMEDIATE LAYER ON PHOTOLUMINESCENCE PROPERTIES OF EUROPIUM

SILICATE THIN FILMS

(Invited talk)

Tae Geun Kim (School of Electrical Engineering, Korea

University, Seoul, Korea,)

Buffet Lunch

Chairperson: Prof. Nguyen Nang Dinh (College Technology, HN)

(A1-15)

13: 30 14: 00 CONTRAST AGENTS FOR MAGNETIC RESONANCE IMAGING BASED ON Fe3O4 MAGNETITE

NANOPARTICLES

(Invited talk)

Tran Hoang Hai, Le Hong Phuc, Doan Thi Kim Dung, Nguyen Thi

Le Huyen, Bui Duc Long et al.(IPE, Ho Chi Minh)

(A1-16)

14: 00 14: 30 RARE-EARTH IONS DOPED CHALCOGENIDE GLASSES AND THE INFLUENCES OF IMPURITIES TO MATRIX

HOST

(Invited talk)

V.G. Truong, A.M Jurdyc, B.S. Ham, B. Jacquier et al. (University

of Hue,Vietnam)

(A1-17)

14: 30 15: 00 SYNTHESIS AND CHARACTERISTICS OF POLY(PARA-PHENYLENEVINYLENE)

(Invited talk)

Pham Thi Minh Chau, Jung Il Jin (IMS, VAST Vietnam)


16

Chairperson: Prof. Tran Hoang Hai (IMS Ho Chi Minh)

(A1-18)

15: 15 15: 45 EXPERIMENTAL STUDY OF 3D SELF-ASSEMBLED PHOTONIC CRYSTAL AND COLLOIDAL CORE-SHELL

SEMICONDUCTOR QUANTUM DOTS

(invited talk)

Pham Thu Nga, Vu Duc Chinh, Pham Thai Cuong, Nguyen Xuan

Nghia, Phan Tien Dung,et. al (IMS, VAST Vietnam)

(A1-19)

15: 45 16: 05 FABRICATION & INVESTIGATION ZnO NANO STRUCTURE ON AL2O3 SUBSTRACTES BY MOCVD

Nguyen Thanh Binh, Vu Thi Bich, Bui Thi Thu Hoai (IPE, VAST),Y.

Segawa (Photodynamics Research Center-RIKEN, Japan)

(A1-20)

16: 05 16: 25 PHOTOLUMINESCENCE OF ZnO TETRAPOD-LIKE NANOSTRUCTURE

Ngo Xuan Dai, Nguyen Ngoc Long, Nguyen Thi Thuc Hien (College

of Natural Sciences, Hanoi)

(A1-21)

16: 25 16: 45 OPTICAL PROPERTIES OF Zn1-xCoxO SYNTHESIZED BY HYDROTHERMAL METHOD

Trinh Thi Loan, Le Hong Ha, Nguyen Ngoc Long, Phung Thi Huong

(College of Natural Sciences, Hanoi)

(A1-22)

16: 45 17: 05 A PREPARATION AND OPTICAL PROPERTIES OF Zn1-xMxO (M=Cr, Mn, Ni)

Nguyen Minh Thuy, Do Thi Sam, Trinh Duc Thien, Phan Thanh

Cong, Tran Minh Thi and Nguyen The Khoi (Pedagogic College of

Hanoi)

(A1-23)

17: 05- 17: 25 CH TO MNG MNG SnO2 C CU TRC NANO BNG PHUONG PHP SOL-GEL

L Khc Bnh, Trnh Thanh Thy, T Ngc Hn (Trng i hc Khoa hc T nhin TpHCM)

17

SESSION A2 : SPECTROSCOPY OF CONDENSED MATTER

AND NANO MATERIALS


Chairperson: Prof. Le Khac Binh (VNU Ho Chi Minh)

(A2-01)

13: 30 13: 50 CHARACTERATION OF PVK-MEH PPV_ Alq3 BASED OLEDS USING TRANPARENT CONDUCTING ANODE

ZnO:Al

Tran Quang Trung, Nguyen Minh Dao (College of Natural

Sciences, Ho Chi Minh)

(A2-02)

13: 50 14: 10 EFFECT OF SEMICONDUCTOR-NANOPARTICALES ON PHOTOLUMINESCENCE AND ELECTRICAL

PROPERTIES OF PVK/TiO2 COMPOSITE MATERIALS

Pham Duy Long, Do Xuan Mai, Dang Van Thanh, Phan Viet Phong

(IMS VAST)

(A2-03)

14: 10 14: 30 STUDY OF OPTICAL PROPERTIES OF SOME CONDUCTING POLYMERS USED FOR OLED

Nguyen Nang Dinh, Tran Chung Thuy, Dang Van Thanh

(Pedagogic College, Uni. Thai Nguyen)

(A2-04)

14: 30 14: 50 STRUCTURE AND OPTICAL PROPERTIES OF Sb: SnO2 THIN FILMS OBTAINED BY THE SOL- GEL METHOD

Nguyen Thanh Binh, Le Thi Thanh Binh, Le Duy Khanh, Nguyen

Ngoc Long (College of Natural Sciences Ha Noi)

(A2-05)

14: 50 15: 10 PREPARATION AND CHARACTERIZATION OF ZnS AND ZnS:CU, AL MATERIAL

Do Thi Sam, Nguyen Minh Thuy and Nguyen The Khoi (Pedagogic

College, Ha Noi)


Chairperson: Prof. Tran Kim Anh (IMS, VAST)

(A2-06)

15: 25 15: 45 EFFECT OF PREPARATION METHOD ON PROPERTIES OF ZnO:Al FILMS

Nguyen Van Hung, Do Danh Bich, Nguyen Thi Thanh Ha, Nguyen

Dinh Lam, Luc Huy Hoang and Nguyen The Khoi (Pedagogic

College Ha Noi)

18

(A2-07)

15: 45 16: 05 PREPARING TRANSPARENT CONDUCTIVE SnO2 THIN FILM BY MAGNETRON SPUTTERING METHOD

Le Van Ngoc, Tran Tuan, Huynh Thanh Dat, Le Tai Huan, Tran

Huu Hung, Pham Ngoc Hien (College of Natural Sciences HCM)

(A2-08) 16: 05 16: 25 LUMINESCENT PROPERTIES OF SnO2NANOWIRES

PREPARED BY THERMAL EVAPORATION

Le Duy Khanh, Nguyen Thanh Binh, Le Thi Thanh Binh, Nguyen

Ngoc Long (College of Natural Sciences Ha Noi)

(A2-09)

16: 25 16: 45 SURFACE EFFECT AND NANOPARTICLE MATERIALS IN MEA (MEMBRANE ELECTRODE ASSEMBLY)

Nguyen Manh Tuan, Nguyen Hoang Tuyen, Nguyen Dinh Thanh

(IPE Ho Chi Minh)

(A2-10)

16: 45 17: 05 SYNTHESIS OF Cr-DOPED Mg2SiO4 (FORSTERITE) BY USING TWO PRECURSOR METHODS

Dao Quoc Huong, Pham Gia Ngu (IOC, VAST)

(A2-11)

17: 05 -17:25 STRUCTURE AND OPTICAL PROPERTIES OF SOL-GEL

SPIN-COATING PREPARED ZINC OXIDE FILMS

Luong Tien Tung, Nguyen The Khoi, Nguyen Van Hung, Luc Huy

Hoang, Nguyen Thi Thanh Ha, Nguyen Thi Thu Hang and Dinh Thi

Phuong Nga (Pedagogic College, Ha Noi)

August 16, 2006 (Thusday)

Chairperson: Prof. Trinh Duc Quang (University of Hue)

(A2-12)

08: 00 08: 25 OPTICAL PROPERTIES OF ZnO:CO FILMS PREPARED BY SOL-GEL METHOD

(Invited talk)

Luc Huy Hoang, Nguyen the Khoi, Nguyen Trong Dung, W.

Pacuski, Luong Tien Tung and Nguyen Van Hung (Pedagogic

College, Hanoi)

(A2-13)

08: 25 08: 45 OPTICAL PROPERTIES OF ZnO NANOWIRE SYNTHESIZED BY VAPOR DEPOSITION WITH NiO-

CATALYST

Doan Manh Ha, Nguyen Thi Thuc Hien, Nguyen Thi Phuong Mai,

Ngo Xuan Dai (College of Natural Sciences, Hanoi, Vietnam)

19

(A2-14)

08: 45 09: 05 FABRICATION, OPTICAL PROPERTIES OF ZnO NANOSTRUCTURES

Man Hoai Nam, Tran Kim Anh, Dinh Xuan Loc and Le Quoc Minh

(IMS, VAST)

(A2-15)

09: 05 09: 25 PHOTOLUMINESCENCE of ZnO NANOSTRUCTURE PREPARED BY CATALYST - ASSISTED VAPOR - LIQUID

- SOLID TECHNIQUE

Tran Thi Quynh Hoa, Ta Dinh Canh, Nguyen Ngoc Long and

Nguyen Viet Tuyen (College of Natural Sciences, Hanoi)

(A2-16)

09: 25 09: 45 INVESTIGATING THE OPTICAL AND ELECTRICAL PROPERTIES OF METAL OXIDE THIN FILMS BY SCOUT

Le Thuy Thanh Giang, Tran Quang Trung, Vo Thi Mai Thuan

(College of Natural Sciences, Ho Chi Minh)


Chairperson: Prof. Pham Thu Nga (IMS, VAST)

(A2-17)

10: 00 10: 20 CVD PREPARED Mn-DOPED ZnO NANOWIRES

T. L Phan, R. Vincent, D. Cherns, and N. X. Nghia (Bristol Uni.

UK)

(A2-18)

10: 20 10: 40 ANALYSIS OF THE KINETICS OF THE COLORATION -BLEACHING PROCESSES ON ELECTROCHROMIC

DEVICES

Le Van Ngoc, Tran Tuan, Huynh Thanh Dat, Nguyen Van Den,

Nguyen Ngoc Thuy Trang. (College of Natural Sciences Ho Chi

Minh)

(A2-19)

10: 40 11: 00 INVESTIGATING ITO FILM BY USING ELLIPSOMETRY

Tran Quang Trung, Le Khac Binh, Nguyen Dang Khoa, Vo Thi Mai

Thuan (College of Natural Sciences HCM)

(A2-20)

11: 00 11: 20 THE SIMULATION OF THE MAGNETRON SPUTTERING PROCESS FOR AL2O3 THIN FILM

Giang van Phuc, Le Vu Tuan Hung, Nguyen Van Den, Huynh Thanh

Dat (An Giang University, An Giang)

(A2-21)

11: 20 11: 40 DESIGNING THE OPTICAL DIELECTRIC MULTILAYER THIN FILM BY GENETIC ALGORITHMS

Le Vu Tuan Hung, Nguyen Van Den, Huynh Thanh Dat (College of

Natural Sciences, Ho Chi Minh)

20

Buffet Lunch

Chairperson: Tran Tuan (College of Natural Sciences, HCM)

(A2-22)

13: 30 13: 50 A COMPARISION ABSORBED DOSES OF TLD-100 AND MTS-N IN THERMAL NEUTRON FIELD AT RESEARCH

NUCLEAR REACTOR DALAT- VIETNAM

Bui The Huy, Huynh Thi Bao Chau, Nguyen Xuan Hai, Pham Dinh

Khang (College of Natural Sciences, Ho Chi Minh)

(A2-23)

13: 50 14: 10 SYNTHESIS OF TiO2 NANOPARTICLES DISPERSED IN ACID OLEIC

Tran Quang Trung, Pham Thi Nhu Quynh (College of Natural


(A2-24)

14: 10 14: 30 TIN HARNESS THIN FILMS

Tran Quang Trung and Vo Thi Anh Thu (College of Natural


(A2-25)

14: 30 14: 50 THE INFLUEN OF Fe ON PHOTOLUMINESCENCE SPECTRUM OF THE ZnSe CRYSTAL (Zn1-xFexSe) IN THE VISIBLE LIGHT BAND

Pham Van Ben (College of Natural Sciences, Ha Noi)


Chairperson: Nguyen Thuc Hien (College of Natural Sciences, H N)

(A2-26)

15: 00 15: 20 EFFECT OF HEAT TREATMENT ON UV-Vis AND OPTICAL PROPERTIES OF PHOTOCATALYTIC TIO2

THIN FILMS

Vu Thi Hanh Thu, Nguyen Huu Chi, Tran Tuan, Le Van Hieu,

Nguyen Thanh Thuy, inh Cong Truong (College of Natural Sciences, Ho Chi Minh)

(A2-27)

15: 20 15: 40 SYNTHESIS AND OPTICAL PROPERTIES OF CdS:Mn2+ AND CdS:Mn2+/ZnS CORE/SHELL QUANTUM DOTS

Pham Thu Nga, Vu Duc Chinh, Chu Viet Ha, Vu Thi Hong Hanh,

Vu Thi Kim Lien, Pham Thai Cuong, C.Barthou, P.Benalloul (IMS,

VAST)

(A2-28)

15: 40 16: 00 THE OPTICAL PROPERTIES OF THE THERMOLUMINESCENCE MATERIAL BASE ON IN-

HOUSE PREPARED LITHIUM BORATE

21

Bui The Huy , Huynh Ky Hanh , Tong Van Tuat, Ha Xuan Vinh,

Huynh Thi Bao Chau , Vu Quoc Viet, Vo Thi Thu Ha (IMS , Nha

Trang )

(A2-29)

16: 00 16: 20 ROLE OF ALKALI IONS IN THE THERMOLUMINESCENCE OF NATURAL VIETNAMESE

QUARTZ

Tran Ngoc, Nguyen Manh Son ,Vu Xuan Quang (University of Hue)

(A2-30)

16: 20 16: 40 THERMOLUMINESCENT PROPERTIES OF Li2B4O7 DOPED METAL IMPURITIES

Ngo Quang Thanh, Nguyen Thi Thu Oanh, Ta Quang Thao, Phan

Tien Dung, Vu Xuan Quang.(IMS, VAST)

(A2-31)

16: 40 17: 00 NATURAL RADIOACTIVITY IN SOME ANCIENT CERAMIC SAMPLES BY ALPHA COUNTING USING

SCINTILLATION SCREEN ZnS:Ag

Huynh Ky Hanh, Phan Tien Dung, Vu Quoc Viet, Tong Van Tuat

(IMS Nha Trang )

(A2-32)

17: 00 17: 20 SYNTHESIS OF TiO2 POUROUS THIN FILMS BY SOL-GEL METHOD

Tran Quang Trung, Huynh Kim Khuong (College of Natural



Chairperson: Prof. Nguyen Quang Liem (IMS, VAST)

(A2-33)

08: 00 08: 20 SOME SPECTROSCOPIC INVESTIGATION ON CHROMIUM SILICA SOL-GEL GLASSES AFTER

HEATING

Vu Phi Tuyen, Nguyen Trong Thanh, Nguyen Thu Trang (IMS,

VAST)

(A2-34)

08: 20 08: 40 SYNTHESIS AND STUDY OF OPTICAL PROPERTIES OF PhTEOS ORMOSIL THIN FILMS

Vu Thi Thuy Duong, Khuc Quang Dat, Nghiem Thi Ha Lien, N.

Xuan Nghia, Nguyen Tat Thanh, Tran Hong Nhung (IPE, VAST)

(A2-35)

08: 40 09: 00 RAMAN STUDY ON SPINTRONIC MATERIAL ZnO: Mn

Nguyen Thi Thuy Lieu, Phan The Long, Nguyen Xuan Nghia (Post

& Telecommunication IOT Ha Noi)

22

(A2-36)

09: 00 09: 20 NANO PARTICALE MATERIALS AND APPLICATION FOR DIRECT METHANOL FUEL CELL (DMFC)

Nguyen Manh Tuan, Nguyen Hoang Tuyen, Nguyen Dinh Thanh

(IPE Ho Chi Minh, VAST)

(A2-37)

09: 20 09: 40 OPTICAL AND ELECTRICAL PROPERTIES OF PEROVSKITE La0.67-xLi3xTiO3 SOLID ELECTROLYTE

THIN FILMS GROWN BY ELECTRON BEAM

EVAPORATION

Pham Duy Long, Do Xuan Mai, Dang Van Thanh and Le Dinh

Trong (IMS,VAST)

(A2-38)

09: 40 10: 00 THERMOELECTRIC AND OPTICAL PROPERTIES OF SINGLE CRYSTAL (Bi,Sb)2Te3

Ngo Thu Huong (College of Natural Sciences, Ha Noi)


Chairperson: Prof. Tran Hong Nhung (IPE, VAST)

(A2-39)

10: 10 10: 30 DEPENDENCE OF CRYSTAL STRUCTURE AND GRAIN BOUNDARY OF La0.7Ca0.3MNO3 + 3%Al2O3

NANOCOMPOSITE ON ANNEALINGTEMPERATURE

P.T. Phong, N.V. Khiem, N.X. Phuc, D.H. Manh, LV. Hong,

N.Chanh (IMS VAST)

(A2-40)

10: 30 10: 50 SOME PHYSICAL CHARACTERISTICS OF SILVER NANOCRYSTALLINE MATERIAL

Le Thi Cat Tuong, Phan Vinh Phuc, Phan T. Ngoc Bich (IMS VAST)

(A2-41)

10: 50 11: 10 EFFECTS OF Sr SUBSTITUTION ON CRYSTALLINE STRUCTURE AND RAMAN SPECTRA OF La2-xSrxNiO4

Tran Dang Thanh, Nguyen Xuan Nghia, Nguyen Van Minh and Le

Van Hong (IMS, VAST)

(A2-42)

11: 10 11: 30 SYNTHESIS AND PROPERTIES OF ANATASE-TiO2 AND TiO2: CO+2 THIN FILMS

Do Danh Bich, Nguyen Dinh Hung, Nguyen Cao Khang and

Nguyen The Khoi (Pedagogic College, Hanoi)

(A2-43)

11: 30 11: 50 PHOTOCATALYTIC TIO2 THIN FILMS FABRICATED BY DC REACTIVE MAGNETRON SPUTTERING

Vu Thi Hanh Thu, Nguyen Huy Chi, Tran Tuan, Le Van Hieu,

Nguyen Chi Tam et al.(College of Natural Sciences, HCM)

23

Buffet Lunch

Chairperson: Prof. Ngo Quoc Buu (Nha Trang IMS)

(A2-44)

13: 30 13: 50 PREPARATION AND CHARACTERISTIC OF

THERMOLUMINESCENT MATERIAL LiF:Mg, Ti

Vu Thi Thai Ha, Nguyen Thi Quy Hai and Nguyen Ngoc

Long (Institute of Materials Science)

(A2-45)

13: 50 14: 10 PREPARATION OF CdSe AND CdTe QUANTUM DOTS FROM CdO

Ung Thi Dieu Thuy, Tran Thi Kim Chi, N.Quang Liem (IMS, VAST)

(A2-46)

14: 10 14: 30 RAMAN SCATTERING FROM CdSe AND CdSe /ZnS COLLOIDAL QUANTUM DOTS (QDs) IN SOLVANT

Le Ba Hai, Nguyen Xun Nghia,Vu uc Chinh, Pham Thu Nga (IMS, VAST)

(A2-47)

14: 30 14: 50 PREPARATION AND STRUCTURE RESEARCH OF Y2O3 NANOPHOSPHOR DOPED WITH Er, Tm IONS

Nguyen Vu, L.T. Cat Tuong, N. Huu Quan, L.T. Kieu Giang and

Tran. Kim Anh (IMS, VAST)

(A2-48)

14: 50 15: 10 STRUCTURAL STUDIES OF A FUCOIDAN FRACTION FROM SARGASSUM POLYCYSTUM

Nguyen Duy Nhut, Thanh Thi Thu Thuy, Bui Minh Ly, Tran Van

Sung (IMS Nha Trang, )

(A2-49)

15: 10 15: 30 THE ROLE OF ALKALI IONS IN THE STIMULATED LUMINESCENCE IN VIETNAM QUARTZ

Le Van Thanh Son, Trinh Duc Quang, Vu Xuan Quang, Tran Thi

Hong, Nguyen Trong Thanh, Ngo Quang Thanh

(A2-50)

15:30-13:50 ELECTROCHROMIC PROPERTIES OF VACUUM

EVAPORATED VANADIUM OXIDE FILMS

Tran Quang Hien,, Le Van Hieu, Tran Thi Thu Nhi, Nguyen Duc

Hao, Nguyen Thanh Nhat Quang(Community College of Tien

Giang)

15: 30 Coffee Break

Closing Meeting at the Plenary Session

24

SESSION B: OPTICS, LASERS and PHOTONICS


Chairperson: Prof. Nguyen Dai Hung (IPE, VAST)

(B-01)

13: 30 13:55 AN ADAPTIVE SPECTROELLIPSOMETRIC TECHNOLOGY FOR ECOLOGICAL MONITORING OF THE WATER

SYSTEMS

(Invited talk)

F.A. Mkrtchyan, V.F. Krapivin, V.I. Kovalev, V.V. Klimov, S.P.

Golovachev (Institute of Radioengineering and Electronics. Moscow,

Russia) (B-02)

13: 55 14:20 LIDAR APPLICATION FOR AIR QUALITY MONITORING: CASE OF AEROSOL CHARACTERISATION AND

INDUSTRIAL SITE SURVEY OF GASEOUS LEAK

(Invited talk)

E. Frejafon, S.Geffroy, L. Ducharne (INERIS, France)

(B-03)

14: 20 14: 45 PHOTONIC RESEARCH AND DEVELOPMENT IN UNIVERSITI TEKNOLOGI MALAYSIA

(Inivited talk)

Noriah Bidin (Universiti Teknologi Malaysia, Malaysia)

(B-04)

14: 45 15:05 STUDY THE BEHAVIOR OF LASER PLASMA IN LONGITUDINAL MAGNETIC FIELD

Noriah Bidin, R.Qindeel, Y. Mat Daud (Universiti Teknologi Malaysia,

Malaysia)


Chairperson: Prof. DrSc. Dinh Van Hoang (VNU Hanoi)

(B-05)

15: 20 15: 45 CHARACTERIZATION OF INTRINSIC PROPERTIES OF SMALL BIOMOLECULES

Franois PIUZZI, Michel Mons, Iliana Dinicoli, Clelia Canuel, W. Chin, M.Elhanine, benjamin tardivel (CNRS, CEA, France)

25

(B-06)

15: 45 16: 10 STRUCTURAL PROPERTIES OF BIOMOLECULES IN THE GAS PHASE: WHAT CAN WE LEARN ?

(Invited talk)

Pierre CARCABAL (LPPM, Universite de Paris-11, France)

(B-07)

16: 10 16: 30 THEORETICAL CALCULATION OF SCATTERING PARAMETERS OF SOME BIOLOGICAL TISSUES WHEN

IRRADIATED BY LASER BEAMS OF WAVELENGTHS OF

780NM AND 940NM

Tran Thi Ngoc Dung, Tran Minh Thai (College of Technology, Ho Chi

Minh, Vietnam)

(B-07)

16: 30 16: 50 DESIGN, FABRICATION AND CHARACTERIZATION OF ERBIUM-DOPED POLYMER SINGLE MODE WAVEGUIDE

FOR OPTICAL AMPLIFICATION AT 1540 NM

Anh Quoc LE QUANG, Joseph ZYSS, Isabelle LEDOUX (ENS Cachan,

France)

(B-09)

16: 50 17: 10 WIDE RANGE WGM LASERS FROM ERBIUM/YTTERBIUM CO-DOPED PHOSPHATE GLASS MICROSPHERES

(Invited talk)

Tran Thi Tam, Dang Quoc Trung, Le Huu Minh, Tran Anh Vu, Do Ngoc Chung and Patrice Fe'ron (College of Technology, Ha Noi)

(B-10)

17: 10 17: 30 IMPROVEMENT OF THE LOCAL ERROR SPLIT-STEP FOURIER METHOD TO SOLVE THE NONLINEAR

SCHRODINGER EQUATION

Thanh Nam Nguyen, Thierry Chartier (ENSSAT, Lannion, France)


Chairperson: Prof. Nguyen The Binh (VNU Hanoi)

(B-11) 08: 00 08: 25 SPECTRAL STRUCTURE AND OTHER CHARACTERISTICS

OF HIGH POWER DIODE LASER BARS THAT PACKAGED

IN VIETNAM

(invited talk)

Vu Van Luc, Bernard Jounet, Luong Vu Hai Nam, Pham Van Truong

and Pham Van Ben (IMS, VAST Vietnam)

(B-12)

08: 25 08: 45 EXPERIMENTAL OBSERVATIONS OF FOUR-WAVE MIXING IN OPTICAL SEMICONDUCTOR AMPLIFIER (SOA).

Vu Doan Mien and Vu Thi Nghiem (IMS, VAST Vietnam)

26

(B-13)

08: 45 09: 05 FREQUENCY STABILIZATION OF A CONTINUOUS WAVE SINGLY RESONANT OPTICAL PARAMETRIC OSCILLATOR

EMITTING IN THE RED

T. H. My, F. Bretenaker, C. Drag, and J.-M. Melkonian (Laboratoire

Aime Cotton, CNRS France)

(B-14)

09: 05 09: 25 PREPARATION OF THE SINGLE MODE PLANAR OPTICAL SPLITTER MODULES AND THEIR CHARACTERIZATIONS

Vu Doan Mien, Vu Thi Nghiem and Pham Van Truong (IMS, VAST

Vietnam)

(B-15)

09: 25 09: 45 HIGH POWER 780NM DFB LASER WITH 500KHz LINEWIDTH

T-P. Nguyen, A. Klehr, O. Brox, G. Erbert, and G. Trnkle (Ferdinand Braun Institut fur Hochstfrequenztechnik, Berlin, Germany)


Chairperson:Prof. DrSc. Tran Ba Chu (MCSET, Hanoi)

(B-16)

10: 00 10: 30 PHOTONICS IN INTERSTELLAR SPACE AND IN THE LABORATORY

(Invited talk)

Philippe Brechignac (Universite de Paris-Sud, France)

(B-17)

10: 30 10: 50 CHEMICAL COMPOSITION OF AGB STARS FROM HIGH RESOLUTION OPTICAL SPECTROSCOPY

Dinh Van Trung (Institute of Astrophysics, Taiwan)

(B-18)

10: 50 11: 10 HYDROCARBON FLAMES BY-PRODUCTS: LABORATORY ANALOGUES OF THE INTERSTELLAR CARBONACEOUS

DUST ?

Cao Anh Tuan , T. Pino, E. Dartois, L. d'Hendecourt, Ph. Brchignac (LPPM, Uni. Paris-11, France)

(B-19)

11: 10 11: 30 SIMULATION OF LASER BEAM PROPAGATION IN BRAIN BY METHOD MONTE CARLO and ADVANTAGE OF LASER

ACUPUNCTURE IN DRUG DETOXIFICATION

Tran Thi Ngoc Dung, Tran Minh Thai (College of Technology, Ho Chi

Minh, Vietnam)

Buffet Lunch

27

Chairperson: Prof. Nguyen Tho Vuong (University of Hue)

(B-20)

13: 30 13: 55 A EMPIRICAL METHOD IN DETERMINATION OF OPTICAL PUMP PARAMETERS FOR FLASHLAMP-PUMPED ERBIUM

GLASS LASER

(Invited talk)

Tuan Ta Van and Khoi Giang Manh (Nacentech, MST, Vietnam)

(B-21)

13: 55 14: 20 OPTICAL TECHNIQUES FOR THE INVESTIGATION OF DEFECTS IN HIGH POWER LASER DIODES

(Invited talk)

Tran Quoc Tien and Jens W. Tomm (Max-Born Institute for Nonlinear

Optics & Short Pulse Spectroscopy. Berlin, Germany)

(B-22)

14: 20 14: 40 RECHEARCH AND DEVELOPMENT OF DIODE-PUMPED PASSIVELY Q-SWITCHED Nd:YVO4 LAS USING Cr4+:YAG

AS SATURABLE ABSORBER

Nguyen Trong Nghia, Do Quoc Khanh, Trinh Dinh Huy, Le H. Hai,

Nguyen Dai Hung (IPE, VAST Vietnam)

(B-23)

14: 40 15:00 ANALYSIS OF DURATION LIMIT OF LASER PULSES EMITTED FROM A CE:LLF SHORT CAVITY

Le Hoang Hai, Nguyen Di Hung, Hoang Huu Hoa, Alex V. QUEMA, Nobuhiko (University Le Quy Don, Vietnam)


Chairperson: Dr. Tran Thi Tam (College of Technology, HaNoi)

(B-24) 15: 25 15: 50 RANDOM LASER IN ZnO POWDER

(Invited talk)

Nguyen The Binh, Nguyen Van Hao, Duong Vu Truong, Nguyen Thi

Hang, Pham Van Thin (College of Natural Sciences, Hanoi, Vietnam).

(B-25)

15: 50 16: 10 SEMICONDUCTOR SATURATED ABSORBER MIRROR (SESAM) USED FOR THE GENERATION OF MODE-

LOCKING ULTRASHORT LASER PULSES AT 1064 nm

Do Quoc Khanh, Nguyen Trong Nghia, Le Thi Thanh Nga, Vu Duong,

Pham Long, Nguyen Dai Hung (IPE, VAST, Vietnam)

(B-26)

16: 10 16: 30 DEVELOPMENT OF A RAPID-SCANNING AUTOCORRELATOR FOR SIMULTANEOUS

MEASUREMENT OF ULTRASHORT LASER PULSES

Do Quoc Khanh, Nguyen Trong Nghia, Le Quang Phuong, Doan Hoai

Son, Nguyen Dai Hung (IPE, VAST, Vietnam)

28

(B-27)

16: 30 16: 50 DEVERLOPMENT A NEW PULSED POWER SOURCE FOR COPPER VAPOR LASER

Nguyen Tien Tuan, Nguyen Cong Thanh, Chu Dinh Thuy and Nguyen

Quang Minh (IPE, VAST, Vietnam)

(B-28)

16: 50 17: 10 A DESIGN OF COMPAC POWER SUPPLY FOR FLASH LAM PUMPED PULSED Nd-YAG LASER

Khoi Giang Manh and Tuan Ta Van (Nacentech, MST, Vietnam)

(B-29)

17: 10 17: 30 DEVELOPMENT OF THE QUENCHING - CAVITY EFFECT AND ITS APPLICATIONS TO NON-MODELOCKABLE

GENERATION OF PICOSECOND LASER PULSES

Doan Hoai Son, Pham Hong Minh, Trinh Dinh Huy, Dinh Xuan Khoa,

Do Q Hoa, Nguyen Dai Hung (IPE, VAST)


Chairperson: Prof. Pham Van Hoi (IMS, VAST)

(B-30) 08: 00 08: 20 ERBIUM DOPED MULTIPLAYER POROUS SILICON FILM

FOR APPLICATION IN PHOTONIC DEVICES

Bui Huy, Pham Van Hoi, Pham Thanh Binh, Tran Thi Cham, Le

Quang Huy and Dao Tran Cao (IMS, VAST, Vietnam)

(B-32) 08: 20 08: 40 APPLICATION OF DIGITAL TECHNIQUE FOR STABILIZING

ERBIUM-DOPED FIBER AMPLIFIER OPERATION

Ha Xuan Vinh, Pham Van Hoi, Tran Thi Cham, Nguyen Quoc Tuan

(IMS Nha Trang, VAST, Vietnam)

(B-33) 08: 40 09: 00 INVESTIGATION AND FABRICATION OF THE NANO -

SIZED OPTICAL FIBER PROBE USED IN NEAR-FIELD

SCANNING OPTICAL MICROSCOPE (NSOM-SNOM)

Do Ngoc Chung, ang Quoc Trung, Tran Th Tam (College of Technology, VNUH, Vietnam)

(B-34) 09: 00 09: 20 THE SHIFT AND WAVELENGTH CONVERSION BASED ON

DFB LASER AND SOA TO USE FOR SINGLE PHOTON

COMMUNICATION SYSTEM

Luong Vu Hai Nam, Vu Van Luc, Bernard Jounet and Tran Thi Phuc

(IMS, VAST Vietnam)

29

(B-35) 09: 20 09: 40 DESIGN AND FABRICATION OF STRUCTURE OF OPTICAL

SPLITTER 1X2 USING HYBRID NANO MATERIAL ASZ

Nguyen Tat Thanh, Nguyen Thanh Binh, Nguyen Thanh Huong, Duong

Thanh Trung, Lam T. Kieu Giang, Le Quoc Minh (IMS, VAST Vietnam)

(B-36) 09: 40 10: 00 ACHIEVEMENTS ON LASER PHYSICS AND LASER

TECHNOLOGY: FROM MASER TO GRASER

Nguyen Tho Vuong (University of HUE, Vietnam)


Chairperson: Prof. Ta Van Tuan (Nacentech, MST)

(B-37) 10: 15 10: 40 A DEVICE FOR OBSERVING THERMAL IMAGES

PROJECTED WITH CO2 LASER

Pham Trong Hien, Tran Ba Chu, Hoang uc Manh, Le Trong Thiep (Institute of Electronics and Telecom., Hanoi, Vietnam)

(B-38) 10: 40 11:00 THE RAMAN LASER WITH DIFFERENT PUMP POWERS

Le MinhTuan, Ho Quang Quy, Chu Van Lanh (University of VINH)

(B-39) 11:00 11: 20 RAMAN STIMULATED SCATTERING IN THREE-

DIMENSIONAL APPROACH

Chu Van Lanh, Dinh Xuan Khoa, Ho Quang Quy (University of VINH)

(B-40) 11: 20 11: 40 INVESTIGATING PULSE DEFORMATED BY SATURABLE

ABSORBER AND THE ACTIVE MEDIUM THE CPM DYE

RING LASER

Dinh Xuan Khoa, Tran Manh Hung (University of VINH)

Buffet Lunch

Chairperson: Prof. Dinh Xuan Khoa (University of Vinh)

(B-41) 13: 30 13: 50 SIMULATION REDISTRIBUTION OF LASER BEAM FROM

NONLIEAR RESONATOR

Ho Quang Quy, Tran Ba Chu, Mai Luu, Tran Ngoc Truoi (Institute of

Applied Physics, Hanoi, VietNam)

(B-42)

13: 50 14: 10 OPTICAL BOUNDARY LAYER OF A BEAM IN TUBAL MEDIUM

Le Thi Quynh Anh, Nguyen Van Den, Ton That Quy, Nguyen Thanh

Nhat Quang (College of Natural Sciences, Ho Chi Minh)

(B-43)

30

14: 10 14: 30 THE SEMI-STATISTICAL APPROXIMATION FOR THE SECOND HARMONIC GENERATION PUMPED BY THE

ARBITRARY PULSE

Tran Hai Hung, Ho Quang Quy (University of VINH, Vietnam)

(B-44) 14: 30 14: 50 SEMI-CLASSICAL THEORY FOR DISTRIBUTED-FEEDBACK

LASER

Cao Thanh Le, Dao Xuan Hoi (Pedagogic College of HATINH)

(B-45) 14: 50 15: 10 INFLUENCE OF NRZ CODE IN OPERATION OF DFB LASER

WITH MULTI-SECTIONS

Nguyen Van Phu, Dinh Van Hoang (University of VINH, Vietnam)

(B-46) 15: 10 15: 30 CHIRP AND TECHNIQUE OF CHIRP COMPENSATION IN

LASER RESONATOR

Giang Manh khoi, Trinh Dinh Chien (College of Natural Sciences, HN)

15: 30 Coffee Break

Closing meeting at the Plenary Session

31

SESSION C: PHOTONIC APPLICATIONS


Chairperson: Prof. Nguyen Van Den (VNU Ho Chi Minh)

(C-01)

08: 00 - 8: 20 INFRARED POLARIZATION SPECTROSCOPY OF

PHENANTHRENE

Le Thanh Tu, Erik W. Thulstrup, Duong Ai Phuong (College of Natural

Sciences, Ho Chi Minh, Vietnam)

(C-02)

08: 20 - 8: 40 FT-IR, FT-RAMAN SPECTRA AND AB INITIO-RHF, DFT-B3LYP

CALCULATIONS OF URIC ACID

Nguyen Hoang Truc, Le Van Truc, Huynh Thanh Dat, Nguyen Van Den

(Pedagogic College of Ho Chi Minh, Vietnam)

(C-03)

08: 40 - 09: 00 IDENTIFICATION OF SOME SEAWEED PHYCOCOLLOIDS BY

USING OF FTIR, FT-RAMAN AND 13C NMR

Tran Thi Thanh Van, Vo Mai Nhu Hieu, Bui Minh Ly (IMS, VAST, NhaTrang)

(C-04)

09: 00 - 09: 20 INVESTIGATION OF ON-LINE ARSENIC SPECIATION ANALYSIS

BY HYPHENATED TECHNIQUE HPLC-UV-HG-AAS

Nguyen Dinh Thuat, Bui Minh Ly, Ngo Quoc Bu, Le Lan Anh et al. (IMS, VAST, Nha Trang, Vietnam)

(C-05)

09: 20 - 09: 40 DESIGN AND CONSTRUCTION OF THE 3D COMPUTER

Pham Hoang Minh, Nguyen Duc Thanh, Pham Hong Duong (IMS, VAST)

09: 40 - 09: 55 Coffee Break

Chairperson: Prof. Nguyen The Khoi (VNU Hanoi)

(C-06)

09: 55 - 10: 15 DOSIMETRIC AND OTICAL CHARACTERISTICS OF

THERMOLUMINESCENT MATERIAL LI2B4O7: Cu

Ngo Quang Thanh, Nguyen Trong Thanh, Vu Xuan Quang, Nguyen The Khoi

(IMS, VAST, Vietnam)

32

(C-07)

10: 15 - 10: 35 THERMOLUMINESCENT CHARACTERS OF CaSO4: Dy SINTERED

DOSIMETER FOR RADIATION DOSIMETRY

Le Van Tuat, Nguyen Van Tao, Nguyen Van Suu, Ngo Quang Thanh

(University of HUE, Vietnam)

(C-08)

10: 35 - 10: 55 TL_ SOFTWARE FOR SIMULATION AND KINETIC ANALYSIS OF

THE THERMOLUMINESCENCE GLOW CURVES

Vinh Hao, Tong Van Tuat, Ngo Van Tam (Nha Trang IMS, VAST Vietnam)

(C-09)

10: 55 - 11: 15 THE RESEARCH, DESIGN, AND MANUFACTURE OF HIGH

TEMPERATURE CONTROLLER FOR SYSTEM MAKING

LUMINESCENT POWDER SAMPLES ZnS: Cu,Mn BY CERAMIC

METHOD WITH SMALL CONSUMPTION OF POWER

Nguyen Duy Tien, Pham Van Ben (College of Natural Sciences, Hanoi)

(C-10)

11: 15 - 11: 35 SOME THERMOLUMINESCENCE DATING IN GO THAP SITE

Nguyen Quang Mien and Bui Van Loat (Institute of Archaeology, Hanoi)

Buffet Lunch

Chairperson: Prof. Chu Dinh Thuy (IPE, VAST)

(C-11)

13: 30 - 13: 50 SOME RESULTS DEVELOPED FROM THE SIMULATION OF

LASER RADIATION PROPAGATION WITH DIFFERENT

WAVELENGTH IN AEROSOL OF DIFFERENT WIDTHS, DENSITY,

SIZE DISTRIBUTION.

Pham Vu Thinh, Tran Thi Phuc, Doan Tung Anh (Military Center for Science,

Engineering and Technology, Hanoi, Vietnam)

(C-12)

13: 50 - 14: 10 THE APPLICATION DIODE LASER IN STUDY AEROSOL OF

MEDIUM AND ACHIEVE RESULTS

Ha Cong Nguyen, Vu Van Luc, Tran Thi Phuc, Luong Vu Hai Nam (Military

Center for Science, Engineering and Technology, Hanoi, Vietnam)

(C-13)

14: 10 - 14: 30 THE STUDY ON THE EXTINCTION PROPERTIES OF THE LASER

BEAM

Bui Thi Thanh Lan, Chu Dinh Thuy, Le Hong Khiem (University of Mining

and Geology, Hanoi, Vietnam)

(C-14)

14: 30 - 14: 50 SIMULATION AND INVESTIGATION OF TISSUE OPTICAL

ALBEDO BY MONTE CARLO METHOD

Huynh Quang Linh, Huynh Thi Thu Thuy, Truong Thi Minh Uyen (College of

Technology, Ho Chi Minh, Vietnam)

33

(C-15)

14: 50 - 15: 10 P DNG PHNG PHP M PHNG MONTE CARLO XC NH C TNH QUANG CA MU NC

Nguyen Tuan Anh, Dang Xuan Cu (Nacentech, MST, Vietnam)

15: 10 - 15: 25 Coffet Break

Chairperson: Dr. Dang Xuan Cu (Nacentech, MST)

(C-16)

15: 25 - 15: 45 MULTIPOLE SEMICONDUCTOR-LASER EQUIPMENT WITH

WAVELENGTH 650 nm AND ITS APPLICATION IN WOUND

HEALING TREATMENT AT CENTRAL MILITARY HOSPITAL 108

Nguyen Trong Luu, Nguyen thi Phuong Chi and Le Phuoc Lam (Central

Military Hospital 108, Hanoi, Vietnam)

(C-17)

15: 45 - 16: 05 BUILDING A LASER PUMPED-FLUORESCENCE SPECTROMETRY

SYSTEM BASED ON SPECTROGRAPH GDM-1000

Nguyen The Binh, Nguyen Anh Tuan, Nguyen Van Hao, Duong Vu Truong,

Pham Quoc Trieu (College of Natural Sciences, Hanoi, Vietnam)

(C-18)

16: 05 - 16: 25 WAVEMETER BASED ON LITTROW GRATING CONFIGURATION

Do Quang Hoa, Vu Duong, Dang Duc Manh, Totaro Imasaka (IPE, VAST)

(C-19)

16: 25 - 16: 45 PHASE-SPACE TOMOGRAPHY: METHOD OF EXTRACTING

INFORMATION FROM PARTIALLY COHERENT WAVEFIELDS

Vo Trong Nghia, CQ Tran, Tran Quang Trung, K.A.Nugent (College of

Natural Sciences, Ho Chi Minh, Vietnam)

(C-20)

16: 45 - 17: 05 EVALUATE KUBELKA-MUNK THEORY IN OFFSET PRINTING

Nguyen Trong Khoa, Dinh Son Thach (Laboratory for Nano-Technology, Ho

Chi Minh, Vietnam)


Chairperson: Prof. Do Van Xe (University of CanTho)

(C-21)

08: 00 - 08: 30 PROBLEM IN TEACHING - LEARNING SPECTROSCOPY FOR

THE PHYSICS STUDENTS OF EDUCATIONAL SCHOOL IN

MEKONG DELTA

(Invited talk)

Nguyen Thi Thu Thuy, Nguyen Hong Nhung, Le Thanh Binh (Pedagogic

College, University of CanTho)

34

(C-22)

08: 30 - 08: 50 DESIGN AND FABRICATION OF SOME EQUIPMENTS FOR

TEACHING GEOMETRICAL OPTICS AND MECHANIC IN

PHYSICS AT HIGH SCHOOL

Nguyen Manh Thao, Ngo Mai Thanh, Pham Hong Hung and Dang Thuy Nga

(Pedagogic College, HaNoi)

(C-23)

08: 50 - 09: 10 AN ALL SOLID LASER KIT FOR EDUCATION AND TRAINING ON

PHOTONICS AND LASERS IN UNIVERSITIES

Do Quoc Khanh, Nguyen Trong Nghia, Pham Long, Trinh Dinh Huy,

Philippe Brechignac, N. The Binh, Nguyen Dai Hung (IPE, VAST, Vietnam)

(C-24)

09: 10 - 09: 30 DESIGNING A VIRTUAL LABORATORY IN

PHOTOREFLECTANCE

Nguyen Thi Ngoc Ha, Truong Kim Hieu, Tran Duy Hoa (College of Natural

Sciences, HoChi Minh, Vietnam)

(C-25)

09: 30 - 09: 45 SIMULATION AND LOCK-IN PHASE ANALYSIS IN

PHOTOREFLECTANCE MODULATION SPECTROSCOPY OF

GAAS, INP AND HETEROJUNCTION STRUCTURE. AlxGa1-

xAs/GaAs/GaAs

Pham thanh Tam, Nguyen Thi Ngoc Ha, Truong Kim Hieu (College of

Natural Sciences, HoChi Minh, Vietnam)

(C-26)

09: 45 - 10: 00 PHOTOLUMINESCENCE AND PHOTOREFLECTANCE

INVESTIGATION OF HETEROJUNCTION STRUCTURE Ga1-

xAlxAs(n+)/GaAs(p

-)/GaAs(p

+)

Huynh Sa Hoang, Truong Kim Hieu, Le Hong Vu, Vuong trung Kien (College

of Natural Sciences, HoChi Minh, Vietnam)

10: 00 - 10: 15 Coffee Break

Chairperson: Prof. Huynh Thanh Dat (VNU Ho Chi Minh)

(C-27)

10: 15 - 10: 35 BISTABILITY OF ALTERNATING NANO-PLATES OF NONLINEAR

MATERIALS

Vu Ngoc Sau, Ho Quang Quy , Nguyen Thi Thanh Tam, Truong Thi Anh Dao

(Military Center for Science, Engineering and Technology, Hanoi, Vietnam)

(C-28)

10: 35 - 10: 55 THE BISTABILITY OF FABRY-PEROT ETALON EMBEDDED

DICLOROETHANE

Ho Quang Quy, Tran Ba Chu, Nguyen Van Hoa (Military Center for Science,

Engineering and Technology, Hanoi, Vietnam)

35

(C-29)

10: 55 - 11: 15 KHI PHC THIT B LASER CO2 Y T, THC NGHIM V KH NNG NG DNG

Hoang Duc Manh, Vu Huu Khanh (Military Center for Sciences, Engineering

and Technology, Hanoi, Vietnam)

(C-30)

11: 15 - 11: 35 NGHIN CU THIT K H QUANG HC THAY I TRNG

NHN CHO THIT B NH NHIT VNG PH 8 - 12mm.

Dang Ngoc Son, Tran The Anh, Nguyen Duc Thang (Military Center for

Sciences, Engineering and Technology, Hanoi, Vietnam)

Buffet Lunch

Chairperson: Prof. Duong Ai Phuong (VNU Ho Chi Minh)

(C-31)

13: 30 - 13: 50 FABRICATION OF TEMPERATURE SENSORS BASED ON FIBER

BRAGG GRATING

Tran Thi Tam, Tran Thanh Cong, Vu Doan Mien, Tran Anh Vu, o Ngoc Chung, ang Quoc Trung (College of Technology, VNUH, Hanoi, Vietnam)

(C-32)

13: 50 - 14: 10 STRAIN SENSORS USING FIBER BRAGG GRATING

TECHNOLOGY

Tran Anh Vu, Dang Quoc Trung, Le Huu Minh, Do Ngoc Chung, Tran Thi

Tam (IMS, VAST, Vietnam)

(C-33)

14: 10 - 14: 30 IMPROVEMENT OF TEMPERATURE SENSITIVITY OF FIBER-

BRAGG-GRATING SENSORS USING LARGE THERMAL

EXPANSION COEFFICIENT MATERIAL SUBSTRATES

Nguyen Thu Trang, Do Thanh Huu, Pham Van Hoi, Pham Thanh Binh, Ha

Xuan Vinh, Chu Th Thu Ha (College of Technology, VNUH, Hanoi, Vietnam) (C-34)

14: 30 - 14: 50 COATINGS FOR PLASTIC LENSES

Pham Hong Tuan, Dang Xuan Cu, Nguyen Tuan Vu (Nacentech, MST,

Vietnam)

(C-35)

14: 50 - 15: 10 CROSSTALK EFFECT ON THE BASIC OF THREE WAVE GUIDES

Mai Hong Hanh and Dinh Van Hoang (College of Natural Scienecs, Hanoi,

Vietnam)

(C-36)

15: 10 - 15: 30 COSMETIC LASER SURGERY AT THE MILITARY CENTRAL

HOSPITAL 108: RECENT RESULTS AND PROSPECTS

Nguyen The Hung, Pham Huu Nghi, Do Thien Dan, Le Huy Tuan, Le Huu

Minh, Pham Long

36

(C-37)

15: 30 - 15: 50 CACULATING EMISSION EFFICIENCY OF COMPACT

FLUORESCENT LAMP

Tran Thi Thanh Van, Le Van Hieu, Vu Hoang Nam (Physics Falcuty, Natural

Science University HoChiMinh City)

(C-38)

15: 30 - 15: 50 KHO ST THNH PHN HA HC 413 SI NIU NGI VIT NAM BNG PH RAMAN

Trn Thanh Nhn, Nguyn Qu o

15: 30 - Coffee Break

Closing meeting at the Plenary Session

37

TNH CHT QUANG HUNH QUANG CA VT LIU ZnO CU TRC NANO-TETRAPOD

Ng Xun i, Nguyn Ngc Long*, Nguyn Th Thc Hin

Trung tm Khoa hc Vt liu - Khoa Vt l, i hc Khoa hc T nhin - i hc Quc gia H Ni

334 - Nguyn Tri - H Ni

Tm tt: Cu trc nano dng tetrapod ca vt liu ZnO c to ra trn silic bng phng php bc bay nhit t vt liu ngun l bt km kim loi. Cc hnh nh t knh hin vi in t qut (SEM) cho thy mi cu trc ZnO

nanotetrapod c bn chn (thanh) vi ng knh 80 300 nm v chiu di hn 10 micromt. Cc php o nhiu x tia X, ph tn sc nng lng (EDS) cho kt qu chng t s kt tinh tt v tinh khit cao ca vt liu ZnO cu trc nano ch to c. Ph quang hunh quang o 14K cho thy c mt vch pht x hp v chim u th ti 3.366 eV vi bn rng ph l 14 meV, cc nh t ngoi cn li nm ti v tr 3.312, 3.238, 3.167, 3.095 eV, v mt nh rng, yu xung quanh 2.5 eV. c th l gii c ngun gc ca cc nh pht x ca vt liu cu trc nano ZnO, cc ph quang hunh quang v kch thch hunh quang c o trong khong nhit t 14K n nhit phng.

T kho: km oxit, nanotetrapod, quang hunh quang

1. M u

ZnO (km oxit) l vt liu bn dn c nhiu c tnh qu gi nh vng cm thng ( rng 3.3 eV ti nhit phng), xc sut chuyn mc quang hc cao, bn vng trong mi trng hir, nhit nng chy cao (1750 oC), khng c v gi thnh r. Chnh v vy, ZnO c quan tm nghin cu t rt sm v tm c nhiu ng dng nh lm vt liu hp th tia t ngoi trong kem m phm, thuc st trng, vt liu xc tc trong ho hc iu ch methanol Thi gian gn y, cc nghin cu v vt liu ZnO, c bit l ZnO dng cu trc nano (ht nano, dy nano, thanh nano, nanotetrapod ) li cng tr nn si ni v hp dn hn do n ha hn nhiu tnh cht mi v kh nng ng dng to ln trong cc lnh vc quang in t, ho hc, sinh hc. Cc hiu ng pht laser v cc linh kin pht quang (LEDs) vng t ngoi c to ra trn c s vt liu ZnO cu trc nano [1,2,3]. Tuy nhin, cho n nay, cc tnh cht pht quang ca vt liu ZnO vn cha c hiu y , cn l ch ca nhiu tranh lun v s tip tc thu ht s tp trung nghin cu t m ca cc nh khoa hc trn ton th gii [4-7].

Trong bo co ny, chng ti trnh by v vic ch to, tnh cht cu trc, thnh phn, hnh thi, cc ph quang hunh quang ca vt liu ZnO c cu trc nano dng

* E-mail: [email protected]

39

Advances in Optics, Photonics, Spectroscopy and Applications. Aug. 2006, Cantho, Vietnam_________________________________________________________________________________

tetrapod. Kt qu o quang hunh quang trong di nhit 14K300K c tp trung phn tch v tho lun mt cch chi tit t c th a ra ngun gc ca cc nh pht quang vng t ngoi ca vt liu ZnO cu trc nanotetrapod.

2. Thc nghim

Vt liu ZnO trong bo co ny c ch to bng phng php bc bay nhit trong khng kh vi vt liu ngun l bt km (Zn) kim loi t 900 oC. Sn phm vt liu thu c l mt lp bt mu trng tinh khit chiu dy khong 0,5 mm bm u trn b mt silic (SiO2/Si). Chi tit ca qu trnh ch to c bo co ti liu tham kho [8]. Chng ti lu mt iu l vt liu ZnO trong bi bo ny c to thnh trong mi trng giu hi km kim loi, v vy kh nng hnh thnh cc v tr km in k, hoc cc nt khuyt xi s l ln. Cc loi khuyt tt ny c th ng vai tr l dono v lm cho ZnO l bn dn loi n.

Sn phm vt liu ch to ra c kho st bng knh hin vi in t qut SEM (JEOL JMS-5410LV, c km chc nng o ph phn gii nng lng EDS), nhiu x k tia X (Brucker D5005). Cc ph hunh quang v kch thch hunh quang o ti cc nhit khc nhau t nhit phng (300K) xung 14 K c thu nhn bi ph k hunh quang FL3-22 Jobin-Yvon gm hai h n sc cch t kp 1200

vch/mm, nh sng kch thch n sc bc sng 335 nm ( 3.7 eV) c ly t mt n xenon cng sut 450 W. Mu vt liu trn silic, php o hunh quang, c gn trong mt cryotstat ca s thch anh, nhit c h thp v iu khin bi mt h my nn kh Heli chu trnh kn v b iu khin nhit LakeShore 330-Autotuning.

3. Kt qu v tho lun

nh SEM trn hnh 1 cho thy mu vt liu ch to ra c hnh thi cu trc dng tetrapod, mi tetrapod c 4 chn hng cn xng ra 4 pha khng gian, ng knh u ca mi chn trong khong 80 nm n 300 nm, chiu di mi chn l trn 10 micromet. Ton b lp vt liu mu trng bm trn b mt Si/SiO2 u c hnh thi ng nht dng tetrapod nh trn hnh 1. Lp vt liu ny c tip tc

Hnh 1. nh SEM ca vt liu ZnO cu trc nano-tetrapod

Hnh 2. Gin nhiu x tia X v ph EDS ca mu ZnO nano-tetrapod (hnh nh).

40

_________________________________________________________________________________Nhng tin b trong Quang hc, Quang t, Quang ph v ng dng. 8/2006, Cn Th, Vit Nam

mang i phn tch v cu trc tinh th v thnh phn nguyn t. Kt qu o v cu trc tinh th c ch ra trn gin nhiu x tia X hnh 2

cho thy mu vt liu l tinh th ZnO vi cu trc lc gic wurzite, ngoi ra khng c pha tinh th no khc. Cc hng s mng xc nh t gin nhiu x tia X c gi tr ph hp vi cc thng s ca tinh th ZnO chun. tinh khit cao ca mu ZnO nanotetrapod cn c chng t hn qua ph phn gii nng lng EDS trn hnh 2 (hnh nh): khng pht hin thy nguyn t l no khc xut hin trong mu ngoi 2 nguyn t Zn v O. Kt qu ca cc php o trn l nhng m bo mang tnh c s cho vic phn tch cc ph hunh quang (PL) v ph kch thch hunh quang (PLE) ca mu vt liu ZnO cu trc nanotetrapod.

Ph PL o ti 14K ca mu ZnO nanotetrapod c ch ra trn hnh 3 cho thy c mt nh pht x hp ti 3,3658 eV, bn rng ca nh l 14 meV. nh pht x mnh v rng hp chng t mu ZnO nanotetrapod c cht lng quang hc tng i tt. Ph PL v PLE ca nh pht x vng xanh l cy o ti 14K c v cng trn th (b) ca hnh 3 cho thy cc nh pht x vng t ngoi (UV) c ngun gc t cc ti hp b vng trong tinh th ZnO.

c th quan st r hn ca cc nh pht x b vng, ph PL 14K c v theo thang logarit c s 10 ca trc cng tng i (trc dc) nh trn hnh 4. Cc k hiu trn hnh 4 tng ng vi cc d on ban u v ngun gc ca cc nh pht x: XA (n=1 hoc n=2) l exciton t do mc c bn (n=1) hoc mc kch thch th nht (n=2), D0X l exciton lin kt vi donor trung ho, BF ng vi ti hp ca in t lin kt trn donor vi l trng vng ho tr, LO l k hiu ca phonon quang dc c nng lng xp x 72 meV [9]. Cc nh cch u nhau v nm thp dn v pha nng lng thp c cho l cc lp li 1, 2, 3 hay 4 phonon (LO) ca cc nh D0X v BF, k hiu tng ng l D0X-1LO, D0X-2LO,, BF-1LO, BF-2LO,(hnh 4).

chng minh cho cc d on v ngun gc cc nh pht x vng UV, s tin trin theo nhit t 14K n 300K ca ph PL c quan st v minh ho trn hnh 5.

Hnh 3. (a)Ph PL trong vng UV v vng nhn thy ti 14 K, (b) Ph PL vng UV v

ph PLE ca nh pht x mu xanh

( 2,5 eV)ti 14 K.

Hnh 4. Ph PL 14K trong vng UV, trc cng c ly theo thang logarit c s

10 ca cng pht x d quan st.

41


Hnh 5. S tin trin theo nhit t 14 K n 300 K ca ph PL vng UV ca mu

ZnO nano-tetrapod. Cc ph c ly thang logarit c s 10 v c sp xp chng ln nhau theo chiu thng ng thun tin theo di.

Kh nng tn ti cc trng thi exciton nhit thp v c nhit phng trong bn dn ZnO l rt cao do y l bn dn AIIBVI vng cm rng c nng lng lin kt excition t do l 60 meV (ng vi nhit dp tt xp x 700K). Cc exciton t do rt "nhy cm" vi s hon ho ca tinh th, n c xu hng b lin kt xung quanh cc tp cht hoc cc sai hng trong bn dn. Trong trng hp ZnO nano-tetrapod hnh thnh trong iu kin giu hi km, nh cp phn trc, s l c c s khi cho rng trong s cc exciton t do c hnh thnh (XA) c nhiu exciton lin kt vi donor trung ho (D0X) v to ra nh pht x hp nhit thp. Nng lng lin kt ca cc exiton lin kt thng khng ln (c t vi meV n 20 meV), nh hn nng lng lin kt ca exciton t do trong ZnO (60 meV), v vy nh D0X s gim nhanh khi nhit tng, nh c th hin trn hnh 5. n nhit 100 K hu nh khng cn nhn thy du vt ca D0X trn ph PL. ng thi vi s gim ca nh D0X l s xut hin r hn ca nh exciton t do XA (n=1) b vai pha nng lng cao ca D

0X trn ph PL. Hin tng ny l

kt qu ca vic D0X khi b phn r do kch thch nhit s chuyn thnh exciton t do v dono. C th nhn thy kh r v tr nh pht x ca exciton XA (b vai) trn cc ph PL ti nhit 50, 70K (hnh 5,6). nh pht x XA (n=2) vi nng lng

ln hn XA (n=1) l 42 meV ph PL o ti 14K trn hnh 4 c qui cho ti hp ca exciton t do A trong trng thi kch thch u tin. Nu tha nhn m hnh nguyn t hir cho exciton t do, t hiu nng lng ca mc kch thch th nht v mc c bn ta c th suy ra nng lng lin kt ca exciton A l 56 meV. Kt qu ny ph hp vi nghin cu ca nhm tc gi [10]. T hnh 5 c th thy rng nh XA (n=1) dch dn v pha nng lng thp khi tng nhit v vn cn tn ti n nhit phng. nhit cao, nh XA trn ln vi nh BF trnh by di y.

Theo nhng thng tin tt nht ca chng ti, cho n nay vn cn nhng kt lun khc nhau xung quanh ngun gc ca nh pht x m c chng ti k hiu l BF trong cc ph PL (hnh 4, 5, 6). C hai ngun gc khc nhau chnh c qui cho nh BF l: (1) do lp li phonon ca ti hp pht x exciton t do XA (mt s

42


tc gi cho l lp li phonon TO, s khc cho l lp li phonon LO) [4,5], (2) do ti hp in t-l trng t mt mc lin kt (l mc dono hoc accepto) vi l trng hoc in t t do [6,7]. Chng ti nghing v cch l gii th hai. So snh ph PL ti hai nhit 50K v 70K trn hnh 6 thy rng cng nh XA gim trong khi cng nh BF li tng. Thng thng th nh pht x lp li phonon phi gim theo nh pht x khng phonon.

Vt liu ZnO nanotetrapod trong trng hp ca chng ti c d on l c nng khuyt tt dono tng i cao nng in t b bt bi cc tm dono nng sau ti hp pht x vi l trng vng ho tr l ln. V vy nh pht x b vng BF (Bound-to-Free) dn chim u th trong ph PL khi nhit tng v tip tc tn ti nhit phng cng cc lp li phonon ca n. Chnh iu ny gp phn lm cho nh pht hunh quang vng t ngoi ti nhit phng ca vt liu ZnO c s m rng bt i xng v pha nng lng thp (hnh 5). Tuy khng tht r nhng chng ti c th quan st thy du hiu ca nh hp th tng ng vi chuyn mc BF trn cc ph PLE, iu ny cng ng h thm gi thit ca chng ti v ngun gc ca nh BF.

4. Kt lun

Vt liu ZnO cu trc nanotetrapod c ch to bng phng php bc bay bt km kim loi trong khng kh th hin tnh kt tinh tt, sch cao, kh nng pht hunh quang mnh. Ph hunh quang ca vt liu c phn tch v t rt ra ngun gc ca nh pht x t ngoi ti nhit phng l s tng hp ca ti hp exciton t do, ti hp ca in t lin kt vi tm dono vi l trng t do vng ho tr v cc lp li phonon ca chng. Mt s tnh cht hunh quang ca vt liu ZnO cu trc nano vn cn l vn m v cn c quan tm nghin t m hn.

Li cm n

Nhm tc gi xin chn thnh cm n PGS. TS. L Vn V v php o nhiu x tia X, cm n CN. Hong c Anh v php chp nh SEM. Cng trnh ny c h tr bi ti nghin cu c bn cp nh nc m s 811304.

Ti liu tham kho

1. M.H. Huang, S. Mao, H. Feick, H. Yan, Y. Wu, H. Kind, E. Weber, R. Russo, and P.

Yang, Science 292, 1897 (2001)

2. H. Cao, Y.G. Zhao, S.T. Ho, E. W. Seelig, Q. H. Wang, and R. P. H. Chang, Phys.

Rev. Lett. 82 No. 11, 2278 (1999)

3. R. Konenkamp, R. C. Word, and M. Godinez, Nanoletters, 5 (10), 10.1021, (2005)

Hnh 6. So snh s thay i cng ca cc nh XA, D

0X v BF trong ph PL o ti 50 K v 70 K.

43


4. Hsu-Cheng Hsu, Wen-Feng Hsieh, Solid State Comm., 131, 371 (2004)

5. Chun Li, Guojia Fang, Fuhai Su, Guohua Li, Xiao Guang Wu and Xing Zhong Zhao,

Nanotech. 17, 3740 (2006)

6. Q. X. Zhao, M. Willander, R. E. Morjan, Q-H. Hu,and E. E. B. Campbell, Appl. Phys.

Lett., 83 No.1, 165 (2003)

7. Dean P.G., Faulkner R.A., Appl. Phys. Lett. 14, 210, (1969)

8. N. X. Dai, N. T. T. Hien, and N. N. Long, VNU. Journal of Science, Math.-Phys.,

T.XX, No 3AP, 38 (2004)

9. R. P. Wang, G. Xu and P. Jin, Phys. Rev. B 69, 113303 (2004)

10. Shan W., Walukiewicz W., Ager III J.W., Yu K.M., Yuan H.B., Xin H.P., Cantwell

G., and Song J.J., Appl. Phys. Lett. 86, 191911, (2005).

PHOTOLUMINESCENCE OF ZnO

TETRAPOD-LIKE NANOSTRUCTURE

Ngo Xuan Dai, Nguyen Ngoc Long, Nguyen Thi Thuc Hien

Center for Materials Science, Faculty of Physics,

Hanoi University of Science, Vietnam National University

334 Nguyen Trai, Thanh Xuan, Hanoi

Abstract: Tetrapod-like nanostructure of zinc oxide material has been grown on silicon

substrates by thermal evaporation method from zinc metal powder as the source material.

Scanning electron microscopy (SEM) clearly showed each of the ZnO tetrapod-like

structure composed of four legs (rods) with diameter in range of 80 300 nm and length of more than ten micrometers. X-ray diffraction, and energy dispersive spectrum (EDS)

measurements gave the results indicated the good crystallinity and high purity of the

fabricated ZnO nanostructure. The photoluminescence spectrum measured at 14 K showed

a sharp and dominant emission line at 3.365 eV with full-with at half maximum of 14

meV, other ultraviolet peaks at 3.312, 3.238, 3.167, 3.095 eV and a broad, weak peak at

around 2.5 eV. In order to interpret the origin of the emission peaks of the ZnO

nanostructured material, the photoluminescence and photoluminescence excitation spectra

were measured in the temperature range from 14 K to the room temperature.

44


TNH CHT QUANG CA Zn1-xCoxO TNG HP BNG PHNG PHP THU NHIT

Trnh Th Loan, Nguyn Ngc Long, L Hng H, Phng Th Hng

Khoa Vt l, Trng HKHTN - HQG - H Ni 334 - Nguyn Tri - H Ni

Tm tt: Cc mu xt km pha tp coban Zn1-xCoxO (x = 0,01 v 0,10) c tng hp bng qu trnh thu nhit 150oC v 200oC trong 1 gi. Cu trc tinh th, kch thc, hnh dng mu tng hp c xc nh qua gin nhiu x tia X v nh SEM. Ph hunh quang v kch thch hunh quang ca cc mu tng hp c kho st cc nhit khc nhau. Ph hunh quang v kch thch hunh quang cho thy ion Co2+ nh x v tr t din trong tinh th.

T kho: Phng php thu nhit, ph hunh quang, Zn1-xCoxO.

1. M u

Trong nhng nm gn y, vt liu ZnO thu ht s ch ca nhiu nhm nghin cu bi cc tnh cht qu bu cng nh kh nng ng dng ca n [1, 2]. c bit khi c pha tp kim loi chuyn tip nh Mn, Co, Fe, do tng tc trao i gia cc ht ti in t do vi cc ion kim loai chuyn tip thay th Zn2+, ngoi cc tnh cht ca cht bn dn, ZnO cn c tnh cht t v c gi l vt liu bn dn t pha long. Loi vt liu ny ha hn nhiu kh nng ng dng, chng c th s dng lm vt liu spintronics nh cc linh kin pht nh sng phn cc, cc chp tch hp b nh v chc nng vi x l, cc linh kin t [3, 4]

Trong bi bo ny chng ti trnh by cc kt qu nghin cu tng hp vt liu Zn1-xCoxO bng phng php thu nhit (x = 0,01 v 0,10), cc tnh cht cu trc, hnh thi hc v hunh quang cng nh kch thch hunh quang ca chng.

2. Thc nghim

Cc mu Zn1-xCoxO (x = 0,01 v 0,10) c tng hp t Zn(NO3)2. 6H2O, Co(NO3)2. 6H2O theo t l mol Zn

2+ : Co

2+ = (1-x) : x. Quy trnh tng hp ca cc

mu c m t theo s hnh 1. Ly 3,00 g Zn(NO3)2. 6H2O v 0,65 g CO(NH2)2 ho tan hon ton vo 175 ml nc ct hai ln. Cho vo hn hp dung dch 5,09 ml Co(NO3)2 0,02M vi mu x = 0,01 hoc 5,56 ml Co(NO3)2 0,2M vi mu x = 0,10, khuy u trong 30 pht. B sung mt lng dung dch NaOH 10M, C2H5OH, khuy u v nng nhit hn hp dung dch ln 150oC. Gi nhit trong 30 pht, tip tc nng nhit hn hp dung dch ln 200oC. Sau khi t n nh nhit trong 5 pht, li h nhit hn hp dung dch xung 150oC v gi trong 25 pht. Sau qu trnh ny thu c sn phm kt ta mu xanh. Mu x = 0,10 c mu xanh m hn so vi mu x = 0,01.

45


Hnh 2. Gin nhiu x tia X ca mu Zn1-xCoxO vi x = 0,01 v 0,10

30 40 50 60 70

C

n

g

t

ng

i

2

x = 0,01

x = 0,10

(100

)

(002

) (1

01

)

(102

)

(110

)

(103

)

(112

) (2

00

)

Cu trc tinh th ca mu tng hp c xc nh qua gin nhiu x tia X (XRD Brucker AXS D5005). Hnh dng v kch thc ca cc mu c xc nh qua nh SEM (SEM JEOL 5410 LV). Ph hunh quang v kch thch hunh quang ca cc mu c kho st ti cc nhit khc nhau trong di 15K 300K (FL3 22 Jobin Yvon Spex), ngun kch thch l n xenon 450W.

3. Kt qu v tho lun

Gin nhiu x tia X ca mu Zn1-xCoxO vi x = 0,01 v 0,10 a ra trn hnh 2 chng t cc mu tng hp c cu trc tinh th lc gic loi wurtzite, ng thi cho thy rt r v tr cc nh nhiu x ca mu x = 0,10 b dch v pha gc 2 ln hn so vi mu x = 0,01. Cn c vo gin nhiu x tia X tnh c hng s mng ng vi mu x = 0,01 l a1 = 3,2476 , c1 = 5,2072 v ng vi mu x = 0,10 l a2 = 3,2247 , c2 = 5,1664 . So snh vi cc gi tr hng s mng a = 3,2498 , c = 5,2066 ca tinh th khi ZnO [5] ta thy cc gi tr hng s mng ca mu x = 0,01 sai lch khng ng k, trong khi vi mu x = 0,10 th s sai khc l ng k (a a2 = 0,0251 , b b2 = 0,0402 ). S sai khc ny chng t ion tp Co

2+ gy nh

hng n cu trc tinh th nn ZnO. iu c th l gii trong phi tr t din, bn knh ion ca Zn2+ l 0,60 v ion Co2+ l 0,58 , nn khi ion tp Co2+ thay th Zn

2+ trong nn ZnO s lm cho mng tinh th co li, tc hng s mng ca tinh th gim i.

Zn(NO3)2.6H2O CO(NH2)2

Dung dch trong sut

Ho tan hon ton trong H2O

NaOH 10 M, khuy u trong 30 pht

Hn hp dung dch

C2H5OH, khuy u, T = 150 oC trong 30 pht,

T= 200 oC trong 5 pht, T = 150 oC trong 25 pht

Kt ta mu xanh

ZnO: Co2+

Lc, ra kt ta bng H2O, C2H5OH

Co(NO3)2

Hnh 1. S quy trnh tng hp mu ZnO: Co2+

46


nh SEM ca cc mu Zn1-xCoxO vi x = 0,01 v 0,10 c a ra trn hnh 3. Vi x = 0,01, mu tng hp l cc thanh mc ra t mt im trng nh nhng bng hoa. Trong mu ny bao gm hai loi hoa, c trng bi hai loi cnh c hnh dng v kch thc khc nhau. Mt loi di khong 5 m, ng knh trung bnh c 800 nm (hnh 3a1). Loi cn li di khong 3 m, ng knh c 170 nm (hnh 3a2). Vi x = 0,10, mu tng hp bao gm cc thanh ri rc, di khong 2 m vi ng knh c 170 nm (hnh 3b).

Hnh 3. nh SEM ca cc mu. (a1, a2): x = 0,01 v (b): x = 0,10

Ph hunh quang ca mu Zn1-xCoxO (x = 0,01 v 0,10) tng hp c kho st trong di nhit 15K 300K vi cc nng lng kch thch khc nhau. Tn hiu hunh quang thu c nm trong hai vng, vng mt thuc di 2,10 eV 3,45 eV, vng hai thuc di 1,65 eV 2,00 eV. Trc tin, tp trung nghin cu tn hiu hunh quang thu c trong vng mt. Hnh 4a a ra cc ph hunh quang ca mu ng vi x = 0,01, kch thch ti 3,815 eV, o cc nhit khc nhau. Ti nhit 15K, trn ph hunh quang quan st thy 2 nh pht x hp 3,368 eV, 3,312 eV v mt nh pht x di rng c cc i 3,201 eV. Khi nhit tng, cng ca cc nh hunh quang gim v v tr nh dch v pha nng lng thp. nhit 50K, trn ph hunh quang xut hin mt nh mi 3,242 eV. Tng nhit ln 75K li xut hin thm mt nh mi khc 3,371 eV. Khi nhit o mu cng tng th s th hin ca hai nh mi ny cng r nt (hnh 4b).

nh pht x hp 3,368 eV (15 K) b dp tt rt nhanh theo s tng ca nhit . n nhit 135K, n hu nh khng cn c quan st thy (hnh 4b). nh pht x ny gy bi s ti hp bc x ca cc exciton lin kt vi dono trung ho (DoX) [2,6]. nh pht x hp 3,312 eV (15 K) b dp tt chm hn rt nhiu so vi nh

Hnh 4. Ph hunh quang ca mu x = 0,01 o cc nhit khc nhau, Eex= 3,815 eV

5 m

(a1)

2 m

(a2)

2 m

(b)

47


3,368 eV (15 K) theo s tng ca nhit v tn ti cho n nhit phng. nh ny c ngun gc t s ti hp bc x ca mt ht ti in lin kt trn mt sai hng v mt ht ti in t do (BF) [6]. Khi nhit tng, di rng 3,201 eV (15 K) b dch mnh v pha nng lng thp v tn ti cho n nhit 150 K (hnh 4a). nh ny do s ti hp bc x ca cc cp dono aceptor (DAP) to ra [6]. Tng t nh cc nh pht x khc, khi nhit tng, nh 3,242 eV (50 K) cng b dch v pha nng lng thp. ng lu , cng mt nhit o khong cch gia nh ny v BF lun khng i, c 71 meV xp x bng nng lng ca phonon quang dc hc, nn c th gn nh 3,242 eV (50 K) vi lp li phonon LO ca BF [6]. nh pht x nng lng cao nht 3,371 eV (75 K), quan st thy khi nh DoX b suy yu v tn ti cho n nhit phng, c gii thch l do s ti hp bc x ca cc exciton t do (XA) [2].

Hnh 5. Ph hunh quang ca mu x = 0,10 o ti cc nhit khc nhau, Eex = 3,815 eV

Hnh 5a a ra ph hunh quang ca mu ng vi x = 0,10 o ti cc nhit khc nhau. Tng t nh mu x = 0,01, khi nhit o mu tng, cng ca cc nh hunh quang gim v v tr nh dch v pha nng lng thp.Ti cng mt nhit o, ta thy v tr cc nh pht x hp ca mu x = 0,10 trng vi mu x = 0,01, nhng v tr nh pht x di rng ca chng li lch nhau mt lng ng k. V tr nh pht x di rng ca mu x = 0,10 lun pha nng lng cao hn so vi mu x = 0,01 (hnh 4a v 5a), nguyn nhn ca hin tng ny cn l vn m.

Hnh 6. Ph hunh quang o ti cc nhit khc nhau, Eex= 2,194 eV

48


Ngoi ra, trong ph hunh quang ca mu x = 0,10 nh pht x ca exciton t do XA th hin r nt hn so vi mu x = 0,01 (hnh 5b).

Cc kt qu nghin cu trn cho thy, tn hiu hunh quang thu c trong vng mt ch lin quan n cc qu trnh ti hp bc x ca cc ht ti quanh b vng ca tinh th nn ZnO. Tip theo, nghin cu tn hiu hunh quang thu c trong vng hai. Hnh 6 a ra ph hunh quang ca mu x = 0,01 v 0,10 o cc nhit khc nhau, kch thch ti nng lng 2,194 eV. Trn ph hunh quang ti 15 K, i vi mu x

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