dielectric resonator nanoantenna at optical frequencies
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Transcript of dielectric resonator nanoantenna at optical frequencies
WELCOME
DIELECTRIC RESONATOR NANOANTENNA AT OPTICAL FREQUENCIES
Guided by, presented by, MRS SABITHA SUDAKAR Yadhu Krishnan SASSISTANT PROFESSOR ECE S7 ECE, ROLL NO:34
CONTENTS
• INTRODUCTION• NANO-ANTENNA• PROPOSED CONFIGURATION• SOFTWARE TOOL• RESULTS• ADVANTAGES• DISADVANTAGES• CONCLUSION• REFERENCE
INTRODUCTION
• To fulfill the growing demands of high data rate communication, researches are now focusing on high frequency bands.
•Comparing to the traditional rf antennas, an equilateral triangular dielectric resonator nano-antenna has been designed and simulated at 193.5THz.
Nano-antennas• A nanoscale antenna-like structure for sending and
transmitting electromagnetic waves.• Nanoantenna , technology being developed to convert light
into electric power.• Magnetic radiations into electric signals.
• Fig:1 shows a single and an array of nano-antenna.
• Fig:2 structure of nano-antenna
• The proposed nano-antenna consists of ‘Ag-SiO2-Ag’ structure having a resonating ‘Si’ dielectric with an equilateral triangular shape.
• The antenna exhibitsan impedance bandwidth of 2.58 % at a center frequency of 193.5THz.
• The nano antenna achieves a directivity of 8.6 dBi with an end-fire radiation pattern.
Proposed antenna configuration
• The proposed configuration of the ETDRNA, designed to operate at a wavelength of 1.55
• The corresponding central frequency is 193.5 THz.• The dimensions of equilateral triangular dielectric are
calculated from equation
• Fig: Side view of ETDRNA
where ‘ =8.85x10-12[F/m], ) = 5, plasmonic frequency fp =1.41e16 rad/s, f =central frequency and collision frequency =2.98e13.
• Fig: top view
Software tool•CST MWS 2012.
Result• The simulated return loss (S11) and directivity of the
nanoantenna is shown in Figure.• The ETDRNAexhibits resonance frequency at 193.5 THz
(0=1.55 m) with maximum dip around −22 dB.
Radiation pattern
Fig: 3D end-fire pattern at 193.5 THz
Advantages• High data rate transmission.• efficiency will be greater than 85%. • can absorb any frequency of light.• Nanoantennas can provide us with a large
energy source.
Disadvantages• using electron beam lithography.• electronic switches and amplifiers.
CONCLUSION•In this paper, we have proposed an ETDRNA for high speedoptical communication.
•The nano-antenna is composed of a‘Ag-SiO2-Ag’ structure.• •The antenna yields an impedance bandwidth of 2.58 % (192.5-197.3 THz).
•High directive radiation pattern of 8.6 dBi at 193.5 THz(1.55 um) with an end-fire pattern.
REFERENCE
• www.hindawi.com.• Balanis, Constantine. "Antenna Theory: A Review",
Proceedings of the IEEE, vol. 80, January 1992.• Bharadwaj, P., Deutsch, B. & Novotny, L. Optical antennas.
Adv. Opt. Photon. 1, 438–483 (2009)
• www.youtube.com.
THANK YOU