Performance Enhancement of Photoconductive Antenna Using Saw-Toothed Plasmonic Contact Electrodes

A photoconductive logarithmic spiral antenna with saw-toothed plasmonic contact electrodes is proposed to provide a higher terahertz radiation compared with the conventional photoconductive antenna (PCA). The use of saw-toothed plasmonic contact electrodes creates a strong electric field between the...

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Autores principales:	Xingyun Zhang, Fangyuan Zhan, Xianlong Wei, Wenlong He, Cunjun Ruan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	photoconductive antenna (PCA) saw-toothed plasmonic contact electrodes terahertz radiation Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/8fa14989c37a42bd98ad61aba1637c1f
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id	oai:doaj.org-article:8fa14989c37a42bd98ad61aba1637c1f
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spelling	oai:doaj.org-article:8fa14989c37a42bd98ad61aba1637c1f2021-11-11T15:41:12ZPerformance Enhancement of Photoconductive Antenna Using Saw-Toothed Plasmonic Contact Electrodes10.3390/electronics102126932079-9292https://doaj.org/article/8fa14989c37a42bd98ad61aba1637c1f2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-9292/10/21/2693https://doaj.org/toc/2079-9292A photoconductive logarithmic spiral antenna with saw-toothed plasmonic contact electrodes is proposed to provide a higher terahertz radiation compared with the conventional photoconductive antenna (PCA). The use of saw-toothed plasmonic contact electrodes creates a strong electric field between the anode and cathode, which generates a larger photocurrent and thereby effectively increases the terahertz radiation. The proposed PCA was fabricated and measured in response to an 80 fs optical pump from a fiber-based femtosecond laser with a wavelength of 780 nm. When the proposed antenna is loaded with an optical pump power of 20 mW and a bias voltage of 40 V, a broadband pulsed terahertz radiation in the frequency range of 0.1–2 THz was observed. Compared to the conventional PCA, the THz power measured by terahertz time domain spectroscopy (THz-TDS) increased by an average of 10.45 times.Xingyun ZhangFangyuan ZhanXianlong WeiWenlong HeCunjun RuanMDPI AGarticlephotoconductive antenna (PCA)saw-toothedplasmonic contact electrodesterahertz radiationElectronicsTK7800-8360ENElectronics, Vol 10, Iss 2693, p 2693 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	photoconductive antenna (PCA) saw-toothed plasmonic contact electrodes terahertz radiation Electronics TK7800-8360
spellingShingle	photoconductive antenna (PCA) saw-toothed plasmonic contact electrodes terahertz radiation Electronics TK7800-8360 Xingyun Zhang Fangyuan Zhan Xianlong Wei Wenlong He Cunjun Ruan Performance Enhancement of Photoconductive Antenna Using Saw-Toothed Plasmonic Contact Electrodes
description	A photoconductive logarithmic spiral antenna with saw-toothed plasmonic contact electrodes is proposed to provide a higher terahertz radiation compared with the conventional photoconductive antenna (PCA). The use of saw-toothed plasmonic contact electrodes creates a strong electric field between the anode and cathode, which generates a larger photocurrent and thereby effectively increases the terahertz radiation. The proposed PCA was fabricated and measured in response to an 80 fs optical pump from a fiber-based femtosecond laser with a wavelength of 780 nm. When the proposed antenna is loaded with an optical pump power of 20 mW and a bias voltage of 40 V, a broadband pulsed terahertz radiation in the frequency range of 0.1–2 THz was observed. Compared to the conventional PCA, the THz power measured by terahertz time domain spectroscopy (THz-TDS) increased by an average of 10.45 times.
format	article
author	Xingyun Zhang Fangyuan Zhan Xianlong Wei Wenlong He Cunjun Ruan
author_facet	Xingyun Zhang Fangyuan Zhan Xianlong Wei Wenlong He Cunjun Ruan
author_sort	Xingyun Zhang
title	Performance Enhancement of Photoconductive Antenna Using Saw-Toothed Plasmonic Contact Electrodes
title_short	Performance Enhancement of Photoconductive Antenna Using Saw-Toothed Plasmonic Contact Electrodes
title_full	Performance Enhancement of Photoconductive Antenna Using Saw-Toothed Plasmonic Contact Electrodes
title_fullStr	Performance Enhancement of Photoconductive Antenna Using Saw-Toothed Plasmonic Contact Electrodes
title_full_unstemmed	Performance Enhancement of Photoconductive Antenna Using Saw-Toothed Plasmonic Contact Electrodes
title_sort	performance enhancement of photoconductive antenna using saw-toothed plasmonic contact electrodes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8fa14989c37a42bd98ad61aba1637c1f
work_keys_str_mv	AT xingyunzhang performanceenhancementofphotoconductiveantennausingsawtoothedplasmoniccontactelectrodes AT fangyuanzhan performanceenhancementofphotoconductiveantennausingsawtoothedplasmoniccontactelectrodes AT xianlongwei performanceenhancementofphotoconductiveantennausingsawtoothedplasmoniccontactelectrodes AT wenlonghe performanceenhancementofphotoconductiveantennausingsawtoothedplasmoniccontactelectrodes AT cunjunruan performanceenhancementofphotoconductiveantennausingsawtoothedplasmoniccontactelectrodes
_version_	1718434362566901760

Performance Enhancement of Photoconductive Antenna Using Saw-Toothed Plasmonic Contact Electrodes

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