This work presents a four-layer absorber based on graphene patterns. Periodic arrays of biased graphene nanodisks and ribbons are exploited, while a graphene sheet top layer enhances the overall absorption. The presented structure is modeled using the circuit model method and simulated to verify its validity and accuracy. A sufficient number of simulations are performed to investigate the robustness of the proposed structure versus the variation of physical parameters such as the thicknesses of the layers, the chemical potentials, and the electron relaxation time. Wideband absorption in the frequency range of 8–9.5 THz is obtained for the proposed device, which can thus be considered for use in several optical applications including optical sensing and detection.

这项工作提出了一种基于石墨烯图案的四层吸收体。利用了周期性排列的偏置石墨烯纳米盘和碳带，而石墨烯片顶层增强了整体吸收。使用电路模型方法对提出的结构进行建模，并进行仿真以验证其有效性和准确性。进行了足够多的模拟，以研究所提出结构的鲁棒性与物理参数（例如层的厚度，化学势和电子弛豫时间）的变化之间的关系。所建议的设备可在8–9.5 THz的频率范围内获得宽带吸收，因此可以考虑将其用于包括光学传感和检测在内的多种光学应用。