A Non-Volatile Tunable Terahertz Metamaterial Absorber Using Graphene Floating Gate

A Non-Volatile Tunable Terahertz Metamaterial Absorber Using Graphene Floating Gate

Based on the graphene floating gate, a tunable terahertz metamaterial absorber is proposed. Compared with the traditional graphene–dielectric–metal absorber, our absorber has the property of being non-volatile and capacity for anti-interference. Using the finite element method, the paper investigate...

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Bibliographic Details
Main Authors: Jinjun Bai, Wei Shen, Jia Shi, Wei Xu, Shusheng Zhang, Shengjiang Chang
Format: Article
Language:English
Published: MDPI AG 2021-03-01
Series:Micromachines
Subjects:
floating gate
graphene
non-volatile
terahertz
tunable
Online Access:https://www.mdpi.com/2072-666X/12/3/333
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spelling doaj-1a27c418241146ff9aba7ae1cfba69102021-03-22T00:01:40ZengMDPI AGMicromachines2072-666X2021-03-011233333310.3390/mi12030333A Non-Volatile Tunable Terahertz Metamaterial Absorber Using Graphene Floating GateJinjun Bai0Wei Shen1Jia Shi2Wei Xu3Shusheng Zhang4Shengjiang Chang5Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems, International Research Center for Photonics, School of electrical and Electronic Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Optoelectronic Detection Technology and Systems, International Research Center for Photonics, School of electrical and Electronic Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Optoelectronic Detection Technology and Systems, International Research Center for Photonics, School of electrical and Electronic Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Optoelectronic Detection Technology and Systems, International Research Center for Photonics, School of electrical and Electronic Engineering, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Optoelectronic Detection Technology and Systems, International Research Center for Photonics, School of electrical and Electronic Engineering, Tiangong University, Tianjin 300387, ChinaInstitute of Modern Optics, Nankai University, Tianjin 300071, ChinaBased on the graphene floating gate, a tunable terahertz metamaterial absorber is proposed. Compared with the traditional graphene–dielectric–metal absorber, our absorber has the property of being non-volatile and capacity for anti-interference. Using the finite element method, the paper investigates the absorption spectra, the electric field energy distribution, the tunability and the physical mechanism. In addition, we also analyse the influence of geometry, polarization and incident angles on the absorption. Simulation results show that the bandwidth of the absorption above 90% can reach up to 2.597 THz at the center frequency of 3.970 THz, and the maximum absorption can be tuned continuously from 14.405% to 99.864% by controlling the Fermi level from 0 eV to 0.8 eV. Meanwhile, the proposed absorber has the advantages of polarization insensitivity and a wide angle, and has potential applications in imaging, sensing and photoelectric detection.https://www.mdpi.com/2072-666X/12/3/333floating gategraphenenon-volatileterahertztunable
collection DOAJ
language English
format Article
sources DOAJ
author Jinjun Bai
Wei Shen
Jia Shi
Wei Xu
Shusheng Zhang
Shengjiang Chang
spellingShingle Jinjun Bai
Wei Shen
Jia Shi
Wei Xu
Shusheng Zhang
Shengjiang Chang
A Non-Volatile Tunable Terahertz Metamaterial Absorber Using Graphene Floating Gate
Micromachines
floating gate
graphene
non-volatile
terahertz
tunable
author_facet Jinjun Bai
Wei Shen
Jia Shi
Wei Xu
Shusheng Zhang
Shengjiang Chang
author_sort Jinjun Bai
title A Non-Volatile Tunable Terahertz Metamaterial Absorber Using Graphene Floating Gate
title_short A Non-Volatile Tunable Terahertz Metamaterial Absorber Using Graphene Floating Gate
title_full A Non-Volatile Tunable Terahertz Metamaterial Absorber Using Graphene Floating Gate
title_fullStr A Non-Volatile Tunable Terahertz Metamaterial Absorber Using Graphene Floating Gate
title_full_unstemmed A Non-Volatile Tunable Terahertz Metamaterial Absorber Using Graphene Floating Gate
title_sort non-volatile tunable terahertz metamaterial absorber using graphene floating gate
publisher MDPI AG
series Micromachines
issn 2072-666X
publishDate 2021-03-01
description Based on the graphene floating gate, a tunable terahertz metamaterial absorber is proposed. Compared with the traditional graphene–dielectric–metal absorber, our absorber has the property of being non-volatile and capacity for anti-interference. Using the finite element method, the paper investigates the absorption spectra, the electric field energy distribution, the tunability and the physical mechanism. In addition, we also analyse the influence of geometry, polarization and incident angles on the absorption. Simulation results show that the bandwidth of the absorption above 90% can reach up to 2.597 THz at the center frequency of 3.970 THz, and the maximum absorption can be tuned continuously from 14.405% to 99.864% by controlling the Fermi level from 0 eV to 0.8 eV. Meanwhile, the proposed absorber has the advantages of polarization insensitivity and a wide angle, and has potential applications in imaging, sensing and photoelectric detection.
topic floating gate
graphene
non-volatile
terahertz
tunable
url https://www.mdpi.com/2072-666X/12/3/333
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