Zhou Qihui, Zha Song, Liu Peiguo, Liu Chenxi, Bian Li-An, Zhang Jihong, Liu Hanqing, Ding Liang
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.
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.
本文提出了一种具有传输带的基于石墨烯的可控宽带太赫兹超材料吸收器。它由石墨烯 - 二氧化硅 - 频率选择表面（FSS）三明治结构组成。正弦形石墨烯层支持连续的等离子体共振，形成一个宽的电调吸收带。带通FSS在吸收带之外构建一个传输窗口。模拟结果表明，从0.5太赫兹到1太赫兹的吸收可以在与角度和偏振无关的情况下从0.4连续调谐到0.9。一个在1.65太赫兹处达到峰值的透明窗口在0.7以上保持高透射率。这种超材料吸收器在检测、隐身、滤波和电磁兼容性方面具有潜在应用。
