Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon

Abstract A planar terahertz metamaterial sensor consisting of a corrugated metal stripe perforated by three rectangular grooves is proposed and investigated numerically. Due to the formation of Fabry-Perot resonance of the spoof surface plasmons mode on the corrugated metal stripe, the extremely sha...

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Autores principales:	Xu Chen, Wenhui Fan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/23d41e369aa8428ca661495cad565cc5
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spelling	oai:doaj.org-article:23d41e369aa8428ca661495cad565cc52021-12-02T15:05:04ZUltrasensitive terahertz metamaterial sensor based on spoof surface plasmon10.1038/s41598-017-01781-62045-2322https://doaj.org/article/23d41e369aa8428ca661495cad565cc52017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01781-6https://doaj.org/toc/2045-2322Abstract A planar terahertz metamaterial sensor consisting of a corrugated metal stripe perforated by three rectangular grooves is proposed and investigated numerically. Due to the formation of Fabry-Perot resonance of the spoof surface plasmons mode on the corrugated metal stripe, the extremely sharp resonance in transmission spectrum associated with strong local field enhancement and high quality factor can be realized and exploited for ultrasensitive sensing. Since the intense interaction between electromagnetic waves and analyte materials, the frequency sensitivity of 1.966 THz per refractive index unit and the figure of merit of 19.86 can be achieved. Meanwhile, the film thickness sensitivity of this metamaterial sensor is higher than 52.5 GHz/μm when the analyte thickness is thinner than 4 μm. More interestingly, we find that the metal thickness has a great effect on the sensor performance. These findings open up opportunities for planar metamaterial structures to be developed into practical sensors in terahertz regime.Xu ChenWenhui FanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xu Chen Wenhui Fan Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon
description	Abstract A planar terahertz metamaterial sensor consisting of a corrugated metal stripe perforated by three rectangular grooves is proposed and investigated numerically. Due to the formation of Fabry-Perot resonance of the spoof surface plasmons mode on the corrugated metal stripe, the extremely sharp resonance in transmission spectrum associated with strong local field enhancement and high quality factor can be realized and exploited for ultrasensitive sensing. Since the intense interaction between electromagnetic waves and analyte materials, the frequency sensitivity of 1.966 THz per refractive index unit and the figure of merit of 19.86 can be achieved. Meanwhile, the film thickness sensitivity of this metamaterial sensor is higher than 52.5 GHz/μm when the analyte thickness is thinner than 4 μm. More interestingly, we find that the metal thickness has a great effect on the sensor performance. These findings open up opportunities for planar metamaterial structures to be developed into practical sensors in terahertz regime.
format	article
author	Xu Chen Wenhui Fan
author_facet	Xu Chen Wenhui Fan
author_sort	Xu Chen
title	Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon
title_short	Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon
title_full	Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon
title_fullStr	Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon
title_full_unstemmed	Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon
title_sort	ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/23d41e369aa8428ca661495cad565cc5
work_keys_str_mv	AT xuchen ultrasensitiveterahertzmetamaterialsensorbasedonspoofsurfaceplasmon AT wenhuifan ultrasensitiveterahertzmetamaterialsensorbasedonspoofsurfaceplasmon
_version_	1718388942802255872

Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon

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