Wave absorbers are considered to be fundamental building blocks for the manipulation of light. Almost all optical systems exploit absorbers to realize some functions. A highly tunable wide-band THz absorber is presented herein. Utilizing a dual-bias scheme with a single graphene layer leads to greater freedom to control the absorption response, while a conventional periodic array of graphene ribbons and a layer of graphene sheet are also exploited. Also, a circuit model representation for all the constituent parts of the proposed absorber is developed with an evolved design methodology. According to the simulation results, wide-band absorption from 3.5 to 6 THz is achieved.

吸波器被认为是操纵光的基本构件。几乎所有的光学系统都利用吸收器来实现某些功能。本文提出了一种高度可调的宽带太赫兹吸收器。利用具有单个石墨烯层的双偏压方案导致更大的自由度来控制吸收响应，同时还利用了常规的周期性周期排列的石墨烯带和石墨烯片层。而且，采用改进的设计方法开发了所提出的吸收器的所有组成部分的电路模型表示。根据仿真结果，可实现3.5至6 THz的宽带吸收。