Issue 83, 2017, Issue in Progress

Significant performance improvement of a terahertz photoconductive antenna using a hybrid structure

Abstract

A photoconductive terahertz antenna based on a distributed Bragg reflector, recessed nanoplasmonic grating and recessed electrodes is proposed in this paper. By use of the finite element method and full wave simulation, the effect of geometrical parameters on the transient photocurrent of a proposed photoconductive antenna is investigated. The recessed nanoplasmonic structure reduces the reflection of laser light to less than 1.5% from the surface of low temperature gallium arsenide in comparison with 29% for a conventional photoconductive antenna. According to the results, the distributed Bragg reflector in combination with recessed nanoplasmonic grating and recessed electrodes results in 5265% photocurrent peak enhancement in comparison to a conventional photoconductive terahertz antenna.

Graphical abstract: Significant performance improvement of a terahertz photoconductive antenna using a hybrid structure

Supplementary files

Article information

Article type
Paper
Submitted
16 Oct 2017
Accepted
07 Nov 2017
First published
16 Nov 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 53010-53017

Significant performance improvement of a terahertz photoconductive antenna using a hybrid structure

M. Bashirpour, S. Ghorbani, M. Kolahdouz, M. Neshat, M. Masnadi-Shirazi and H. Aghababa, RSC Adv., 2017, 7, 53010 DOI: 10.1039/C7RA11398F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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