This slide is based on how a nanoantenna can be implemented at optical frequencies within a dielectric resonator.

1. WELCOME

2. DIELECTRIC RESONATOR NANOANTENNA AT
OPTICAL FREQUENCIES
Guided by, presented by,
MRS SABITHA SUDAKAR Yadhu Krishnan S
ASSISTANT PROFESSOR ECE S7 ECE, ROLL NO:34

3. CONTENTS
• INTRODUCTION
• NANO-ANTENNA
• PROPOSED CONFIGURATION
• SOFTWARE TOOL
• RESULTS
• ADVANTAGES
• DISADVANTAGES
• CONCLUSION
• REFERENCE

4. 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.

6. 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.

7. • 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.

8. 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

9. • 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

10. Software tool
•CST MWS 2012.

11. 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.

12. Radiation pattern
Fig: 3D end-fire pattern at 193.5 THz

13. 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.

14. Disadvantages
• using electron beam lithography.
• electronic switches and amplifiers.

15. CONCLUSION
•In this paper, we have proposed an ETDRNA for high speed
optical 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.

16. 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.

17. THANK YOU