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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