Terahertz Metamaterial Modulator Based on Phase Change Material VO2

In this paper, a new type of terahertz (THz) metamaterial (MM) modulator has been presented with bifunctional properties based on vanadium dioxide (VO2). The design consists of a VO2 resonator, polyimide substrate, frequency selective surface (FSS) layer...

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Autores principales:	Yanfei Dong, Dingwang Yu, Gaosheng Li, Mingtuan Lin, Li-An Bian
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	metamaterial modulator VO<sub>2</sub> thermal FSS modulation Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/4610dc267e2e4a1a8ac892baecb6af51
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spelling	oai:doaj.org-article:4610dc267e2e4a1a8ac892baecb6af512021-11-25T19:07:50ZTerahertz Metamaterial Modulator Based on Phase Change Material VO<sub>2</sub>10.3390/sym131122302073-8994https://doaj.org/article/4610dc267e2e4a1a8ac892baecb6af512021-11-01T00:00:00Zhttps://www.mdpi.com/2073-8994/13/11/2230https://doaj.org/toc/2073-8994In this paper, a new type of terahertz (THz) metamaterial (MM) modulator has been presented with bifunctional properties based on vanadium dioxide (VO<sub>2</sub>). The design consists of a VO<sub>2</sub> resonator, polyimide substrate, frequency selective surface (FSS) layer, and VO<sub>2</sub> film. Based on the metal-insulator transition (MIT) of VO<sub>2</sub>, this structure integrated with VO<sub>2</sub> material can achieve the dynamic modulation on both transmission and reflection waves at 2.5 THz by varying the electrical conductivity value of VO<sub>2</sub>. Meanwhile, it also exhibits adjustable absorption performance across the whole band from 0.5–7 THz. At the lower conductivity (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>σ</mi></semantics></math></inline-formula> = 25 S/m), this structure can act as a bandpass FSS, and, at the high conductivity (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>σ</mi></semantics></math></inline-formula> = 2 × 10<sup>5</sup> S/m), it behaves like a wideband absorber covering 2.52–6.06 THz with absorption <i>A</i> > 0.9, which realizes asymmetric transmission. The surface electric field distributions are illustrated to provide some insight into the physical mechanism of dynamic modulation. From the simulated results, it can be observed that this design has the capability of controlling tunable manipulation on both transmission/reflection responses at a wide frequency band. This proposed design may pave a novel pathway towards thermal imaging, terahertz detection, active modulators, etc.Yanfei DongDingwang YuGaosheng LiMingtuan LinLi-An BianMDPI AGarticlemetamaterial modulatorVO<sub>2</sub>thermalFSSmodulationMathematicsQA1-939ENSymmetry, Vol 13, Iss 2230, p 2230 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	metamaterial modulator VO<sub>2</sub> thermal FSS modulation Mathematics QA1-939
spellingShingle	metamaterial modulator VO<sub>2</sub> thermal FSS modulation Mathematics QA1-939 Yanfei Dong Dingwang Yu Gaosheng Li Mingtuan Lin Li-An Bian Terahertz Metamaterial Modulator Based on Phase Change Material VO<sub>2</sub>
description	In this paper, a new type of terahertz (THz) metamaterial (MM) modulator has been presented with bifunctional properties based on vanadium dioxide (VO<sub>2</sub>). The design consists of a VO<sub>2</sub> resonator, polyimide substrate, frequency selective surface (FSS) layer, and VO<sub>2</sub> film. Based on the metal-insulator transition (MIT) of VO<sub>2</sub>, this structure integrated with VO<sub>2</sub> material can achieve the dynamic modulation on both transmission and reflection waves at 2.5 THz by varying the electrical conductivity value of VO<sub>2</sub>. Meanwhile, it also exhibits adjustable absorption performance across the whole band from 0.5–7 THz. At the lower conductivity (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>σ</mi></semantics></math></inline-formula> = 25 S/m), this structure can act as a bandpass FSS, and, at the high conductivity (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>σ</mi></semantics></math></inline-formula> = 2 × 10<sup>5</sup> S/m), it behaves like a wideband absorber covering 2.52–6.06 THz with absorption <i>A</i> > 0.9, which realizes asymmetric transmission. The surface electric field distributions are illustrated to provide some insight into the physical mechanism of dynamic modulation. From the simulated results, it can be observed that this design has the capability of controlling tunable manipulation on both transmission/reflection responses at a wide frequency band. This proposed design may pave a novel pathway towards thermal imaging, terahertz detection, active modulators, etc.
format	article
author	Yanfei Dong Dingwang Yu Gaosheng Li Mingtuan Lin Li-An Bian
author_facet	Yanfei Dong Dingwang Yu Gaosheng Li Mingtuan Lin Li-An Bian
author_sort	Yanfei Dong
title	Terahertz Metamaterial Modulator Based on Phase Change Material VO<sub>2</sub>
title_short	Terahertz Metamaterial Modulator Based on Phase Change Material VO<sub>2</sub>
title_full	Terahertz Metamaterial Modulator Based on Phase Change Material VO<sub>2</sub>
title_fullStr	Terahertz Metamaterial Modulator Based on Phase Change Material VO<sub>2</sub>
title_full_unstemmed	Terahertz Metamaterial Modulator Based on Phase Change Material VO<sub>2</sub>
title_sort	terahertz metamaterial modulator based on phase change material vo<sub>2</sub>
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4610dc267e2e4a1a8ac892baecb6af51
work_keys_str_mv	AT yanfeidong terahertzmetamaterialmodulatorbasedonphasechangematerialvosub2sub AT dingwangyu terahertzmetamaterialmodulatorbasedonphasechangematerialvosub2sub AT gaoshengli terahertzmetamaterialmodulatorbasedonphasechangematerialvosub2sub AT mingtuanlin terahertzmetamaterialmodulatorbasedonphasechangematerialvosub2sub AT lianbian terahertzmetamaterialmodulatorbasedonphasechangematerialvosub2sub
_version_	1718410274212413440

Terahertz Metamaterial Modulator Based on Phase Change Material VO<sub>2</sub>

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