A High Quality-Factor Optical Modulator with Hybrid Graphene-Dielectric Metasurface Based on the Quasi-Bound States in the Continuum
In this paper, we combine the dielectric metasurface with monolayer graphene to realize a high quality(Q)-factor quasi-BIC-based optical modulator, and the corresponding modulation performances are investigated by using the finite-difference time-domain (FDTD) method, which can be well fitting by th...
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| Format: | Article |
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MDPI AG
2022-11-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/13/11/1945 |
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| author | Chaolong Li Hongbo Cheng Xin Luo Ziqiang Cheng Xiang Zhai |
| author_facet | Chaolong Li Hongbo Cheng Xin Luo Ziqiang Cheng Xiang Zhai |
| author_sort | Chaolong Li |
| collection | DOAJ |
| description | In this paper, we combine the dielectric metasurface with monolayer graphene to realize a high quality(Q)-factor quasi-BIC-based optical modulator, and the corresponding modulation performances are investigated by using the finite-difference time-domain (FDTD) method, which can be well fitting by the Fano formula based on the temporal couple-mode theory. The results demonstrate that bound states in the continuum (BIC) will turn into the quasi-BIC with high Q-factor by breaking the symmetry of every unit of the metasurface. Meanwhile, the amplitude and bandwidth of transmission based on the quasi-BIC mode can be efficiently adjusted by changing the Fermi energy (<i>E<sub>F</sub></i>) of monolayer graphene, and the maximum difference in transmission up to 0.92 is achieved. Moreover, we also discuss the influence of the asymmetry degree to further investigate the modulation effect of graphene on the quasi-BIC mode. |
| first_indexed | 2024-03-09T18:49:48Z |
| format | Article |
| id | doaj.art-468a5ba6b83b48dbbb250e2789e78fdb |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T18:49:48Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
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| series | Micromachines |
| spelling | doaj.art-468a5ba6b83b48dbbb250e2789e78fdb2023-11-24T05:55:36ZengMDPI AGMicromachines2072-666X2022-11-011311194510.3390/mi13111945A High Quality-Factor Optical Modulator with Hybrid Graphene-Dielectric Metasurface Based on the Quasi-Bound States in the ContinuumChaolong Li0Hongbo Cheng1Xin Luo2Ziqiang Cheng3Xiang Zhai4School of Science, East China Jiaotong University, Nanchang 330013, ChinaScience and Technology on Aerospace Chemical Power Laboratory, Hubei Institute of Aerospace Chemotechnology, Xiangyang 441003, ChinaSchool of Science, East China Jiaotong University, Nanchang 330013, ChinaSchool of Science, East China Jiaotong University, Nanchang 330013, ChinaKey Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410082, ChinaIn this paper, we combine the dielectric metasurface with monolayer graphene to realize a high quality(Q)-factor quasi-BIC-based optical modulator, and the corresponding modulation performances are investigated by using the finite-difference time-domain (FDTD) method, which can be well fitting by the Fano formula based on the temporal couple-mode theory. The results demonstrate that bound states in the continuum (BIC) will turn into the quasi-BIC with high Q-factor by breaking the symmetry of every unit of the metasurface. Meanwhile, the amplitude and bandwidth of transmission based on the quasi-BIC mode can be efficiently adjusted by changing the Fermi energy (<i>E<sub>F</sub></i>) of monolayer graphene, and the maximum difference in transmission up to 0.92 is achieved. Moreover, we also discuss the influence of the asymmetry degree to further investigate the modulation effect of graphene on the quasi-BIC mode.https://www.mdpi.com/2072-666X/13/11/1945bound states in the continuummetasurfacegraphene |
| spellingShingle | Chaolong Li Hongbo Cheng Xin Luo Ziqiang Cheng Xiang Zhai A High Quality-Factor Optical Modulator with Hybrid Graphene-Dielectric Metasurface Based on the Quasi-Bound States in the Continuum Micromachines bound states in the continuum metasurface graphene |
| title | A High Quality-Factor Optical Modulator with Hybrid Graphene-Dielectric Metasurface Based on the Quasi-Bound States in the Continuum |
| title_full | A High Quality-Factor Optical Modulator with Hybrid Graphene-Dielectric Metasurface Based on the Quasi-Bound States in the Continuum |
| title_fullStr | A High Quality-Factor Optical Modulator with Hybrid Graphene-Dielectric Metasurface Based on the Quasi-Bound States in the Continuum |
| title_full_unstemmed | A High Quality-Factor Optical Modulator with Hybrid Graphene-Dielectric Metasurface Based on the Quasi-Bound States in the Continuum |
| title_short | A High Quality-Factor Optical Modulator with Hybrid Graphene-Dielectric Metasurface Based on the Quasi-Bound States in the Continuum |
| title_sort | high quality factor optical modulator with hybrid graphene dielectric metasurface based on the quasi bound states in the continuum |
| topic | bound states in the continuum metasurface graphene |
| url | https://www.mdpi.com/2072-666X/13/11/1945 |
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