| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Tunable terahertz transmission behaviors and coupling mechanism in hybrid MoS2 metamaterials |
| Yuwang Deng(邓雨旺), Qingli Zhou(周庆莉)†, Wanlin Liang(梁菀琳), Pujing Zhang(张朴婧), and Cunlin Zhang(张存林) |
| Key Laboratory of Terahertz Optoelectronics, Ministry of Education, and Beijing Advanced Innovation Center for Imaging Theory and Technology, Department of Physics, Capital Normal University, Beijing 100048, China |
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Abstract A hybrid metamaterial with the integration of molybdenum disulfide (MoS2) overlayer is proposed to manipulate the terahertz (THz) wave. The simulated results indicate that the introduction of MoS2 layer could significantly modify the resonant responses with large resonance red-shift and bandwidth broadening due to the depolarization field effect, especially for the structure on the small permitivity substrate. Additionally, the wide-band modulator in off-resonant region and a switch effect at resonance can be achieved by varying the conductivity of MoS2 layer. Further theoretical calculations based on the Lorentz coupling model are consistent with the simulated results, explicating the response behaviors originate from the coupling between MoS2 overlayer and the metastructure. Our results could provide a possibility for active control THz modulator and switchable device based on the MoS2 overlayer and advance the understanding of the coupling mechanism in hybrid structures.
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Received: 14 July 2021
Revised: 16 August 2021
Accepted manuscript online: 22 August 2021
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PACS:
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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42.15.Eq
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(Optical system design)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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42.25.Dd
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(Wave propagation in random media)
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| Fund: Project supported by Beijing Natural Science Foundation of China (Grant No. 4181001) and the National Natural Science Foundation of China (Grant Nos. 62075142 and 61875140). |
Corresponding Authors:
Qingli Zhou
E-mail: qlzhou@cnu.edu.cn
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Cite this article:
Yuwang Deng(邓雨旺), Qingli Zhou(周庆莉), Wanlin Liang(梁菀琳), Pujing Zhang(张朴婧), and Cunlin Zhang(张存林) Tunable terahertz transmission behaviors and coupling mechanism in hybrid MoS2 metamaterials 2022 Chin. Phys. B 31 014101
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