基于石墨烯的具有传输带的可控宽带太赫兹超材料吸收器

Graphene Based Controllable Broadband Terahertz Metamaterial Absorber with Transmission Band.

作者信息

Zhou Qihui, Zha Song, Liu Peiguo, Liu Chenxi, Bian Li-An, Zhang Jihong, Liu Hanqing, Ding Liang

机构信息

College of Electronic Science, National University of Defense Technology, Changsha 410073, China.

School of Physical and Electronic Science, Changsha University of Science and Technology, Changsha 410114, China.

出版信息

Materials (Basel). 2018 Nov 29;11(12):2409. doi: 10.3390/ma11122409.

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.