High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb2S3

Graphene absorbers have attracted lots of interest in recent years. They provide huge potential for applications such as photodetectors, modulators, and thermal emitters. In this letter, we design a high-quality (Q) factor resonant graphene absorber based on the phase change material Sb2&...

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Autores principales:	Qi Meng, Xingqiao Chen, Wei Xu, Zhihong Zhu, Shiqiao Qin, Jianfa Zhang, Xiaodong Yuan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	graphene absorbers phase change material high Q Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/4885ebc1eb764e9d8e13ac7b419a6c4d
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spelling	oai:doaj.org-article:4885ebc1eb764e9d8e13ac7b419a6c4d2021-11-25T18:30:04ZHigh Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>10.3390/nano111128202079-4991https://doaj.org/article/4885ebc1eb764e9d8e13ac7b419a6c4d2021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2820https://doaj.org/toc/2079-4991Graphene absorbers have attracted lots of interest in recent years. They provide huge potential for applications such as photodetectors, modulators, and thermal emitters. In this letter, we design a high-quality (Q) factor resonant graphene absorber based on the phase change material Sb<sub>2</sub>S<sub>3</sub>. In the proposed structure, a refractive index grating is formed at the subwavelength scale due to the periodical distributions of amorphous and crystalline states, and the structure is intrinsically flat. The numerical simulation shows that nearly 100% absorption can be achieved at the wavelength of 1550 nm, and the Q factor is more than hundreds due to the loss-less value of Sb<sub>2</sub>S<sub>3</sub> in the near-infrared region. The absorption spectra can be engineered by changing the crystallization fraction of the Sb<sub>2</sub>S<sub>3</sub> as well as by varying the duty cycle of the grating, which can be employed not only to switch the resonant wavelength but also to achieve resonances with higher Q factors. This provides a promising method for realizing integrated graphene optoelectronic devices with the desired functionalities.Qi MengXingqiao ChenWei XuZhihong ZhuShiqiao QinJianfa ZhangXiaodong YuanMDPI AGarticlegraphene absorbersphase change materialhigh QChemistryQD1-999ENNanomaterials, Vol 11, Iss 2820, p 2820 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	graphene absorbers phase change material high Q Chemistry QD1-999
spellingShingle	graphene absorbers phase change material high Q Chemistry QD1-999 Qi Meng Xingqiao Chen Wei Xu Zhihong Zhu Shiqiao Qin Jianfa Zhang Xiaodong Yuan High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>
description	Graphene absorbers have attracted lots of interest in recent years. They provide huge potential for applications such as photodetectors, modulators, and thermal emitters. In this letter, we design a high-quality (Q) factor resonant graphene absorber based on the phase change material Sb<sub>2</sub>S<sub>3</sub>. In the proposed structure, a refractive index grating is formed at the subwavelength scale due to the periodical distributions of amorphous and crystalline states, and the structure is intrinsically flat. The numerical simulation shows that nearly 100% absorption can be achieved at the wavelength of 1550 nm, and the Q factor is more than hundreds due to the loss-less value of Sb<sub>2</sub>S<sub>3</sub> in the near-infrared region. The absorption spectra can be engineered by changing the crystallization fraction of the Sb<sub>2</sub>S<sub>3</sub> as well as by varying the duty cycle of the grating, which can be employed not only to switch the resonant wavelength but also to achieve resonances with higher Q factors. This provides a promising method for realizing integrated graphene optoelectronic devices with the desired functionalities.
format	article
author	Qi Meng Xingqiao Chen Wei Xu Zhihong Zhu Shiqiao Qin Jianfa Zhang Xiaodong Yuan
author_facet	Qi Meng Xingqiao Chen Wei Xu Zhihong Zhu Shiqiao Qin Jianfa Zhang Xiaodong Yuan
author_sort	Qi Meng
title	High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>
title_short	High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>
title_full	High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>
title_fullStr	High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>
title_full_unstemmed	High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>
title_sort	high q resonant graphene absorber with lossless phase change material sb<sub>2</sub>s<sub>3</sub>
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4885ebc1eb764e9d8e13ac7b419a6c4d
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_version_	1718411071645024256

High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>

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