Ultrawideband Terahertz Absorber with Dielectric Cylinders Loaded Patterned Graphene Structure

In this paper, we theoretically designed and numerically analyzed an ultrabroadband meta-absorber with near unity absorptivity that works in terahertz spectrum. A wideband meta-absorber composed of bilayer patterned graphene and dielectric cylinder array with high symmetry was proposed. The wideband...

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Autores principales:	Shuxiang Liu, Shufang Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	fabry-perot cavity graphene broadband absorber plasmon resonance Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/4209f688d6254fd0a392d4dd79b5e52c
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spelling	oai:doaj.org-article:4209f688d6254fd0a392d4dd79b5e52c2021-11-11T18:00:09ZUltrawideband Terahertz Absorber with Dielectric Cylinders Loaded Patterned Graphene Structure10.3390/ma142164271996-1944https://doaj.org/article/4209f688d6254fd0a392d4dd79b5e52c2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6427https://doaj.org/toc/1996-1944In this paper, we theoretically designed and numerically analyzed an ultrabroadband meta-absorber with near unity absorptivity that works in terahertz spectrum. A wideband meta-absorber composed of bilayer patterned graphene and dielectric cylinder array with high symmetry was proposed. The wideband absorption mechanism benefited from two aspects. The first one was enhanced surface plasmons based on bilayer patterned graphene. And the second one was the coupling of continuous resonant modes within Fabry-Perot cavities to the enhanced surface plasmons in the graphene. An ultrawide bandwidth with absorptivity over <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>90</mn><mo>%</mo></mrow></semantics></math></inline-formula> were obtained from <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>3.2</mn></mrow></semantics></math></inline-formula> THz to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>9.4</mn></mrow></semantics></math></inline-formula> THz. Simulated results showed that the proposed ultra-wideband absorbing structure also possessed high performance of polarization independence, flexible tunability, large incident angle insensitivity, and compact fabrication.Shuxiang LiuShufang LiMDPI AGarticlefabry-perot cavitygraphenebroadband absorberplasmon resonanceTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6427, p 6427 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fabry-perot cavity graphene broadband absorber plasmon resonance Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	fabry-perot cavity graphene broadband absorber plasmon resonance Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Shuxiang Liu Shufang Li Ultrawideband Terahertz Absorber with Dielectric Cylinders Loaded Patterned Graphene Structure
description	In this paper, we theoretically designed and numerically analyzed an ultrabroadband meta-absorber with near unity absorptivity that works in terahertz spectrum. A wideband meta-absorber composed of bilayer patterned graphene and dielectric cylinder array with high symmetry was proposed. The wideband absorption mechanism benefited from two aspects. The first one was enhanced surface plasmons based on bilayer patterned graphene. And the second one was the coupling of continuous resonant modes within Fabry-Perot cavities to the enhanced surface plasmons in the graphene. An ultrawide bandwidth with absorptivity over <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>90</mn><mo>%</mo></mrow></semantics></math></inline-formula> were obtained from <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>3.2</mn></mrow></semantics></math></inline-formula> THz to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>9.4</mn></mrow></semantics></math></inline-formula> THz. Simulated results showed that the proposed ultra-wideband absorbing structure also possessed high performance of polarization independence, flexible tunability, large incident angle insensitivity, and compact fabrication.
format	article
author	Shuxiang Liu Shufang Li
author_facet	Shuxiang Liu Shufang Li
author_sort	Shuxiang Liu
title	Ultrawideband Terahertz Absorber with Dielectric Cylinders Loaded Patterned Graphene Structure
title_short	Ultrawideband Terahertz Absorber with Dielectric Cylinders Loaded Patterned Graphene Structure
title_full	Ultrawideband Terahertz Absorber with Dielectric Cylinders Loaded Patterned Graphene Structure
title_fullStr	Ultrawideband Terahertz Absorber with Dielectric Cylinders Loaded Patterned Graphene Structure
title_full_unstemmed	Ultrawideband Terahertz Absorber with Dielectric Cylinders Loaded Patterned Graphene Structure
title_sort	ultrawideband terahertz absorber with dielectric cylinders loaded patterned graphene structure
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4209f688d6254fd0a392d4dd79b5e52c
work_keys_str_mv	AT shuxiangliu ultrawidebandterahertzabsorberwithdielectriccylindersloadedpatternedgraphenestructure AT shufangli ultrawidebandterahertzabsorberwithdielectriccylindersloadedpatternedgraphenestructure
_version_	1718431937983414272

Ultrawideband Terahertz Absorber with Dielectric Cylinders Loaded Patterned Graphene Structure

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