Wave absorbers are considered main operational block for light manipulation. Numerous optical and electromagnetic systems can be realized via wave absorbers such as wave modulators, filters, and detectors. Here in this work, a highly tunable wave absorber is proposed, which includes three layers of grapheme patterns on dielectric. While whole device is placed on top of a relatively thick metallic reflector. Leveraging dual bias scheme for periodic arrays of grapheme ribbons and exploiting impedance matching concept give the opportunity to adjust absorption response via external bias voltages. All consisting parts of the device are modeled by passive circuit elements include resistor, inductor, and capacitor. Compared to conventional methods of full wave numerical modeling like finite element methods, the presented design methodology requires less CPU time and occupied memory. According to the simulation results, proposed wave absorber shows a multi-band absorption with four peaks, which make it perfect choice for several application from medical imaging to indoor communication.

中文翻译：

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五偏置、三层石墨烯基太赫兹吸收器：利用石墨烯带的双偏置周期阵列

波吸收器被认为是光操纵的主要操作块。许多光学和电磁系统可以通过波吸收器（例如波调制器、滤波器和检测器）来实现。在这项工作中，提出了一种高度可调的吸波器，它包括电介质上的三层石墨烯图案。而整个设备被放置在一个相对较厚的金属反射器的顶部。利用石墨烯带周期性阵列的双偏置方案并利用阻抗匹配概念提供了通过外部偏置电压调整吸收响应的机会。器件的所有组成部分都由无源电路元件建模，包括电阻器、电感器和电容器。与传统的全波数值建模方法（如有限元方法）相比，所提出的设计方法需要更少的 CPU 时间和占用的内存。根据仿真结果，所提出的吸波器显示出具有四个峰值的多波段吸收，这使其成为从医学成像到室内通信的多种应用的理想选择。