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

M. Bashirpour; S. Ghorbani; M. Kolahdouz; M. Neshat; M. Masnadi-Shirazi; H. Aghababa

doi:10.1039/c7ra11398f

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

M. Bashirpour
, S. Ghorbani
, M. Kolahdouz
, M. Neshat
, M. Masnadi-Shirazi
, H. Aghababa

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

15 Downloads (Pure)

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.

Original language	English
Pages (from-to)	53010-53017
Journal	RSC Advances
Volume	7
Issue number	83
DOIs	https://doi.org/10.1039/c7ra11398f
Publication status	Published - 16 Nov 2017
Externally published	Yes

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10.1039/c7ra11398fLicence: CC BY

Significant performance improvement of a terahertz photoconductive antenna using a hybrid structure
Copyright 2017 The Authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Final published version, 827 KBLicence: CC BY

Cite this

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title = "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. ",

author = "M. Bashirpour and S. Ghorbani and M. Kolahdouz and M. Neshat and M. Masnadi-Shirazi and H. Aghababa",

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AU - Bashirpour, M.

AU - Ghorbani, S.

AU - Kolahdouz, M.

AU - Neshat, M.

AU - Masnadi-Shirazi, M.

AU - Aghababa, H.

PY - 2017/11/16

Y1 - 2017/11/16

N2 - 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.

AB - 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.

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DO - 10.1039/c7ra11398f

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JO - RSC Advances

JF - RSC Advances

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

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