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Optical and Quantum Electronics

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01-11-2023

Radiated power and directivity analysis of a nano-dot photoconductive antenna

Authors: Jyothishree Pillai, Madhur Deo Upadhayay, Jitendra Prajapati

Published in: Optical and Quantum Electronics | Issue 11/2023

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Abstract

The lower efficiency of a Photoconductive Antenna is a significant bottleneck in using them for several applications. This manuscript presents a solution to improve the photoconductive antenna performance using the nano-dot structures in the electrode’s gap. This study analyses the nano-dots’ shape, size, and spacing effects on the current pulse and the frequency response of a normal photoconductive antenna. For the analysis, square, hexagonal, and circular shape dots are considered with different sizes and spacing. The optimization study shows that not all combinations enhance photoconductive antenna performance using the above-defined dots. The circular dot photoconductive antenna produces an enhancement of 63.16 and 166.2% in the current pulse amplitude and radiated power, respectively, using different combinations of nano-dot size and gap. The frequency response analysis shows that the circular dot photoconductive antenna produces highest directivity (8.76 dBi) among all the nano-dot geometries.

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Title: Radiated power and directivity analysis of a nano-dot photoconductive antenna
Authors: Jyothishree Pillai
Madhur Deo Upadhayay
Jitendra Prajapati
Publication date: 01-11-2023
Publisher: Springer US
Published in: Optical and Quantum Electronics / Issue 11/2023
Print ISSN: 0306-8919
Electronic ISSN: 1572-817X
DOI: https://doi.org/10.1007/s11082-023-05322-6

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