Tunable terahertz transmission behaviors and coupling mechanism in hybrid MoS 2 metamaterials

A hybrid metamaterial with the integration of molybdenum disulfide (MoS 2 ) overlayer is proposed to manipulate the terahertz (THz) wave. The simulated results indicate that the introduction of MoS 2 layer could significantly modify the resonant responses with large resonance red-shift and bandwidth...

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Bibliographic Details
Published in:Chinese physics B 2022-01, Vol.31 (1), p.14101
Main Authors: Deng, Yuwang, Zhou, Qingli, Liang, Wanlin, Zhang, Pujing, Zhang, Cunlin
Format: Article
Language:English
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Summary:A hybrid metamaterial with the integration of molybdenum disulfide (MoS 2 ) overlayer is proposed to manipulate the terahertz (THz) wave. The simulated results indicate that the introduction of MoS 2 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 MoS 2 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 MoS 2 overlayer and the metastructure. Our results could provide a possibility for active control THz modulator and switchable device based on the MoS 2 overlayer and advance the understanding of the coupling mechanism in hybrid structures.
ISSN:1674-1056
DOI:10.1088/1674-1056/ac1fde