Graphene-metasurface for wide-incident-angle terahertz absorption

Ri-hui XIONG; Xiao-qing PENG; Jiu-sheng LI

doi:10.1631/FITEE.2000079

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Front. Inform. Technol. Electron. Eng ›› 2021, Vol. 22 ›› Issue (3) : 334-340. DOI: 10.1631/FITEE.2000079

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Graphene-metasurface for wide-incident-angle terahertz absorption

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Abstract

We demonstrate a graphene-metasurface structure for tunable wide-incident-angle terahertz wave absorption, which involves depositing planar arrays of Omega-shaped graphene patterns on a silicon dioxide substrate. We also discuss how the graphene Fermi-level layer and various substrates affect the absorption characteristics. The absorption of the proposed terahertz absorber is above 80% at an incident angle of 0°–60° in frequencies ranging from 0.82 to 2.0 THz. Our results will be very beneficial in the application of terahertz wave communications and biomedical imaging/sensing systems.

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Graphene-metasurface / Terahertz absorber / Omega-shaped graphene patterns

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Ri-hui XIONG, Xiao-qing PENG, Jiu-sheng LI. Graphene-metasurface for wide-incident-angle terahertz absorption. Front. Inform. Technol. Electron. Eng, 2021, 22(3): 334‒340 https://doi.org/10.1631/FITEE.2000079