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Graphene Based Controllable Broadband Terahertz Metamaterial Absorber with Transmission Band. 2018

Qihui Zhou, and Song Zha, and Peiguo Liu, and Chenxi Liu, and Li-An Bian, and Jihong Zhang, and Hanqing Liu, and Liang Ding
College of Electronic Science, National University of Defense Technology, Changsha 410073, China. zhouqihui10@126.com.

A graphene-based controllable broadband terahertz metamaterial absorber with transmission band is presented in this paper. It consists of a graphene-SiO₂-frequency selective surface (FSS) sandwich structure. The sinusoidal graphene layer supports continuous plasmonic resonances, forming a broad electric-tuning absorbing band. Bandpass FSS constructs a transmission window outside the absorbing band. The simulation results indicate that the absorption from 0.5 THz to 1 THz can be tuned continuously from 0.4 to 0.9 with angle and polarization independence. A transparent window peaking at 1.65 THz maintains high transmittance over 0.7. The metamaterial absorber has potential applications for detection, stealth, filtering, and electromagnetic compatibility.

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