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

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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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  1. Jyothishree Pillai, Madhur Deo Upadhayay and Jitendra Prajapati have contributed equally to this work.

Authors and Affiliations

  1. Department of Electrical Engineering, Shiv Nadar Institution of Eminence Deemed to be University, Delhi-NCR, Dadri, Greater Noida, 201314, Uttar Pradesh, India

    Jyothishree Pillai, Madhur Deo Upadhayay & Jitendra Prajapati

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  1. Jyothishree Pillai
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  2. Madhur Deo Upadhayay
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  3. Jitendra Prajapati
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Correspondence to Jitendra Prajapati.

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Pillai, J., Upadhayay, M.D. & Prajapati, J. Radiated power and directivity analysis of a nano-dot photoconductive antenna. Opt Quant Electron 55, 1017 (2023). https://doi.org/10.1007/s11082-023-05322-6

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