Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared

In this paper, a tunable absorber composed of asymmetric grating based on a graphene-dielectric-metal structure is proposed. The absorption of the absorber can be modified from 99.99% to 61.73% in the near-infrared by varying the Fermi energy of graphene, and the absorption wavelength can be tuned b...

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Autores principales:	Shuhua Cao, Qi Wang, Xufeng Gao, Shijie Zhang, Ruijin Hong, Dawei Zhang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	graphene absorber Fano resonance Fermi energy sensor Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/368137b298bd4cd984e195ad15f7a055
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spelling	oai:doaj.org-article:368137b298bd4cd984e195ad15f7a0552021-11-25T18:23:06ZMonolayer-Graphene-Based Tunable Absorber in the Near-Infrared10.3390/mi121113202072-666Xhttps://doaj.org/article/368137b298bd4cd984e195ad15f7a0552021-10-01T00:00:00Zhttps://www.mdpi.com/2072-666X/12/11/1320https://doaj.org/toc/2072-666XIn this paper, a tunable absorber composed of asymmetric grating based on a graphene-dielectric-metal structure is proposed. The absorption of the absorber can be modified from 99.99% to 61.73% in the near-infrared by varying the Fermi energy of graphene, and the absorption wavelength can be tuned by varying the grating period. Furthermore, the influence of other geometrical parameters, the incident angle, and polarization are analyzed in detail by a finite-difference time-domain simulation. The graphene absorbers proposed in this paper have potential applications in the fields of stealth, sense, and photoelectric conversion. When the absorber that we propose is used as a gas sensor, the sensitivity of 200 nm/RIU with FOM can reach up to 159 RIU<sup>−1</sup>.Shuhua CaoQi WangXufeng GaoShijie ZhangRuijin HongDawei ZhangMDPI AGarticlegrapheneabsorberFano resonanceFermi energysensorMechanical engineering and machineryTJ1-1570ENMicromachines, Vol 12, Iss 1320, p 1320 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	graphene absorber Fano resonance Fermi energy sensor Mechanical engineering and machinery TJ1-1570
spellingShingle	graphene absorber Fano resonance Fermi energy sensor Mechanical engineering and machinery TJ1-1570 Shuhua Cao Qi Wang Xufeng Gao Shijie Zhang Ruijin Hong Dawei Zhang Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared
description	In this paper, a tunable absorber composed of asymmetric grating based on a graphene-dielectric-metal structure is proposed. The absorption of the absorber can be modified from 99.99% to 61.73% in the near-infrared by varying the Fermi energy of graphene, and the absorption wavelength can be tuned by varying the grating period. Furthermore, the influence of other geometrical parameters, the incident angle, and polarization are analyzed in detail by a finite-difference time-domain simulation. The graphene absorbers proposed in this paper have potential applications in the fields of stealth, sense, and photoelectric conversion. When the absorber that we propose is used as a gas sensor, the sensitivity of 200 nm/RIU with FOM can reach up to 159 RIU<sup>−1</sup>.
format	article
author	Shuhua Cao Qi Wang Xufeng Gao Shijie Zhang Ruijin Hong Dawei Zhang
author_facet	Shuhua Cao Qi Wang Xufeng Gao Shijie Zhang Ruijin Hong Dawei Zhang
author_sort	Shuhua Cao
title	Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared
title_short	Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared
title_full	Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared
title_fullStr	Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared
title_full_unstemmed	Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared
title_sort	monolayer-graphene-based tunable absorber in the near-infrared
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/368137b298bd4cd984e195ad15f7a055
work_keys_str_mv	AT shuhuacao monolayergraphenebasedtunableabsorberinthenearinfrared AT qiwang monolayergraphenebasedtunableabsorberinthenearinfrared AT xufenggao monolayergraphenebasedtunableabsorberinthenearinfrared AT shijiezhang monolayergraphenebasedtunableabsorberinthenearinfrared AT ruijinhong monolayergraphenebasedtunableabsorberinthenearinfrared AT daweizhang monolayergraphenebasedtunableabsorberinthenearinfrared
_version_	1718411248333225984

Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared

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