High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>
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&...
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| Format: | Article |
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MDPI AG
2021-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/11/2820 |
| _version_ | 1797509077590343680 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:12:44Z |
| format | Article |
| id | doaj.art-4885ebc1eb764e9d8e13ac7b419a6c4d |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T05:12:44Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-4885ebc1eb764e9d8e13ac7b419a6c4d2023-11-23T00:38:52ZengMDPI AGNanomaterials2079-49912021-10-011111282010.3390/nano11112820High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb<sub>2</sub>S<sub>3</sub>Qi Meng0Xingqiao Chen1Wei Xu2Zhihong Zhu3Shiqiao Qin4Jianfa Zhang5Xiaodong Yuan6College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaGraphene 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.https://www.mdpi.com/2079-4991/11/11/2820graphene absorbersphase change materialhigh Q |
| spellingShingle | 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> Nanomaterials graphene absorbers phase change material high Q |
| title | 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_short | 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 |
| topic | graphene absorbers phase change material high Q |
| url | https://www.mdpi.com/2079-4991/11/11/2820 |
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