Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency

A bifunctional tunable metamaterial composed of pattern metal structure, graphene, and strontium titanate (STO) film is proposed and studied numerically and theoretically. The dual plasmon-induced transparency (PIT) window is obtained by coupling the bright state cut wire (CW) and two pairs of dark...

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Autores principales:	Tong Wu, Guan Wang, Yang Jia, Yabin Shao, Chen Chen, Jing Han, Yang Gao, Yachen Gao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	plasmon-induced transparency terahertz graphene strontium titanate slow light Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/2f72e67ecb684680a269a0217909ac5f
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spelling	oai:doaj.org-article:2f72e67ecb684680a269a0217909ac5f2021-11-25T18:30:32ZDual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency10.3390/nano111128762079-4991https://doaj.org/article/2f72e67ecb684680a269a0217909ac5f2021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2876https://doaj.org/toc/2079-4991A bifunctional tunable metamaterial composed of pattern metal structure, graphene, and strontium titanate (STO) film is proposed and studied numerically and theoretically. The dual plasmon-induced transparency (PIT) window is obtained by coupling the bright state cut wire (CW) and two pairs of dark state dual symmetric semiring resonators (DSSRs) with different parameters. Correspondingly, slow light effect can also be realized. When shifting independently, the Fermi level of the graphene strips, the amplitudes of the two PIT transparency windows and slow light effect can be tuned, respectively. In addition, when independently tuning the temperature of the metamaterial, the frequency of the dual PIT windows and slow light effect can be tuned. The physical mechanism of the dual-PIT was analyzed theoretically by using a three-harmonic oscillator model. The results show that the regulation function of the PIT peak results from the change of the oscillation damping at the dark state DSSRs by tuning conductivity of graphene. Our design presents a new structure to realize the bifunctional optical switch and slow light.Tong WuGuan WangYang JiaYabin ShaoChen ChenJing HanYang GaoYachen GaoMDPI AGarticleplasmon-induced transparencyterahertzgraphenestrontium titanateslow lightChemistryQD1-999ENNanomaterials, Vol 11, Iss 2876, p 2876 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	plasmon-induced transparency terahertz graphene strontium titanate slow light Chemistry QD1-999
spellingShingle	plasmon-induced transparency terahertz graphene strontium titanate slow light Chemistry QD1-999 Tong Wu Guan Wang Yang Jia Yabin Shao Chen Chen Jing Han Yang Gao Yachen Gao Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency
description	A bifunctional tunable metamaterial composed of pattern metal structure, graphene, and strontium titanate (STO) film is proposed and studied numerically and theoretically. The dual plasmon-induced transparency (PIT) window is obtained by coupling the bright state cut wire (CW) and two pairs of dark state dual symmetric semiring resonators (DSSRs) with different parameters. Correspondingly, slow light effect can also be realized. When shifting independently, the Fermi level of the graphene strips, the amplitudes of the two PIT transparency windows and slow light effect can be tuned, respectively. In addition, when independently tuning the temperature of the metamaterial, the frequency of the dual PIT windows and slow light effect can be tuned. The physical mechanism of the dual-PIT was analyzed theoretically by using a three-harmonic oscillator model. The results show that the regulation function of the PIT peak results from the change of the oscillation damping at the dark state DSSRs by tuning conductivity of graphene. Our design presents a new structure to realize the bifunctional optical switch and slow light.
format	article
author	Tong Wu Guan Wang Yang Jia Yabin Shao Chen Chen Jing Han Yang Gao Yachen Gao
author_facet	Tong Wu Guan Wang Yang Jia Yabin Shao Chen Chen Jing Han Yang Gao Yachen Gao
author_sort	Tong Wu
title	Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency
title_short	Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency
title_full	Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency
title_fullStr	Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency
title_full_unstemmed	Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency
title_sort	dual-spectral plasmon-induced transparent terahertz metamaterial with independently tunable amplitude and frequency
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2f72e67ecb684680a269a0217909ac5f
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Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency

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