Polarization Insensitive Broadband Concentric- Annular-Strip Octagonal Terahertz Graphene Metamaterial Absorber

In this paper, a polarization insensitive terahertz (THz) graphene metamaterial absorber (MA) with wide bandwidth is proposed, which consists of three concentric annular strips and one octagonal unit graphene structures. By adjusting the positions of the annular strips and octagonal unit, and optimi...

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Autores principales:	Heming Yu, Peiwen Xiang, Yuanfeng Zhu, Shan Huang, Xingfang Luo
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2022
Materias:	Terahertz (THz) metamaterial absorber (MA) polarization insensitive tunable hybridization and stacking effects Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/fb3aee2f4b454abaad7630e0417bf980
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spelling	oai:doaj.org-article:fb3aee2f4b454abaad7630e0417bf9802021-12-01T00:00:13ZPolarization Insensitive Broadband Concentric- Annular-Strip Octagonal Terahertz Graphene Metamaterial Absorber1943-065510.1109/JPHOT.2021.3123608https://doaj.org/article/fb3aee2f4b454abaad7630e0417bf9802022-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9594680/https://doaj.org/toc/1943-0655In this paper, a polarization insensitive terahertz (THz) graphene metamaterial absorber (MA) with wide bandwidth is proposed, which consists of three concentric annular strips and one octagonal unit graphene structures. By adjusting the positions of the annular strips and octagonal unit, and optimizing the length and width of each individual strip, the hybridization effect and stacking effect can be fully enhanced, and the whole structure can ensure wide and strong absorption performance. The designed MA can maintain the absorptivity above 90% in the range of 1.027–1.958 THz, and most of them are above 95%. Meanwhile, the absorption spectrum under different polarization conditions also show that the proposed THz graphene MA structure is insensitive to polarization and incident angle. The electric field intensity distribution illustrates the mechanism of broadband absorption. Moreover, the conductivity of graphene can be adjusted by external gate voltage, which brings tunable absorption results. Finally, the THz MA absorber based on concentric gradient design has the advantages of tunability, high absorption, broadband, incident angle and polarization insensitivity, which can provide a helpful reference for the design of other absorbers to broaden the bandwidth and enhance the absorption.Heming YuPeiwen XiangYuanfeng ZhuShan HuangXingfang LuoIEEEarticleTerahertz (THz)metamaterial absorber (MA)polarization insensitivetunablehybridization and stacking effectsApplied optics. PhotonicsTA1501-1820Optics. LightQC350-467ENIEEE Photonics Journal, Vol 14, Iss 1, Pp 1-6 (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Terahertz (THz) metamaterial absorber (MA) polarization insensitive tunable hybridization and stacking effects Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
spellingShingle	Terahertz (THz) metamaterial absorber (MA) polarization insensitive tunable hybridization and stacking effects Applied optics. Photonics TA1501-1820 Optics. Light QC350-467 Heming Yu Peiwen Xiang Yuanfeng Zhu Shan Huang Xingfang Luo Polarization Insensitive Broadband Concentric- Annular-Strip Octagonal Terahertz Graphene Metamaterial Absorber
description	In this paper, a polarization insensitive terahertz (THz) graphene metamaterial absorber (MA) with wide bandwidth is proposed, which consists of three concentric annular strips and one octagonal unit graphene structures. By adjusting the positions of the annular strips and octagonal unit, and optimizing the length and width of each individual strip, the hybridization effect and stacking effect can be fully enhanced, and the whole structure can ensure wide and strong absorption performance. The designed MA can maintain the absorptivity above 90% in the range of 1.027–1.958 THz, and most of them are above 95%. Meanwhile, the absorption spectrum under different polarization conditions also show that the proposed THz graphene MA structure is insensitive to polarization and incident angle. The electric field intensity distribution illustrates the mechanism of broadband absorption. Moreover, the conductivity of graphene can be adjusted by external gate voltage, which brings tunable absorption results. Finally, the THz MA absorber based on concentric gradient design has the advantages of tunability, high absorption, broadband, incident angle and polarization insensitivity, which can provide a helpful reference for the design of other absorbers to broaden the bandwidth and enhance the absorption.
format	article
author	Heming Yu Peiwen Xiang Yuanfeng Zhu Shan Huang Xingfang Luo
author_facet	Heming Yu Peiwen Xiang Yuanfeng Zhu Shan Huang Xingfang Luo
author_sort	Heming Yu
title	Polarization Insensitive Broadband Concentric- Annular-Strip Octagonal Terahertz Graphene Metamaterial Absorber
title_short	Polarization Insensitive Broadband Concentric- Annular-Strip Octagonal Terahertz Graphene Metamaterial Absorber
title_full	Polarization Insensitive Broadband Concentric- Annular-Strip Octagonal Terahertz Graphene Metamaterial Absorber
title_fullStr	Polarization Insensitive Broadband Concentric- Annular-Strip Octagonal Terahertz Graphene Metamaterial Absorber
title_full_unstemmed	Polarization Insensitive Broadband Concentric- Annular-Strip Octagonal Terahertz Graphene Metamaterial Absorber
title_sort	polarization insensitive broadband concentric- annular-strip octagonal terahertz graphene metamaterial absorber
publisher	IEEE
publishDate	2022
url	https://doaj.org/article/fb3aee2f4b454abaad7630e0417bf980
work_keys_str_mv	AT hemingyu polarizationinsensitivebroadbandconcentricannularstripoctagonalterahertzgraphenemetamaterialabsorber AT peiwenxiang polarizationinsensitivebroadbandconcentricannularstripoctagonalterahertzgraphenemetamaterialabsorber AT yuanfengzhu polarizationinsensitivebroadbandconcentricannularstripoctagonalterahertzgraphenemetamaterialabsorber AT shanhuang polarizationinsensitivebroadbandconcentricannularstripoctagonalterahertzgraphenemetamaterialabsorber AT xingfangluo polarizationinsensitivebroadbandconcentricannularstripoctagonalterahertzgraphenemetamaterialabsorber
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Polarization Insensitive Broadband Concentric- Annular-Strip Octagonal Terahertz Graphene Metamaterial Absorber

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