论文标题
基于两个定期阵列的石墨烯磁盘的宽带和极化不敏感的THZ吸收器的设计
Design of a broadband and polarization insensitive THz absorber based on two layers of periodic arrays of graphene disks
论文作者
论文摘要
在本文中，我们通过分析设计了宽带THZ和对极化吸收器的简单配置。提到的吸收器由两个石墨烯磁盘组成，并且考虑了整个提出的吸收器结构的传输线模型，以准确设计它。因此，通过传输线模型获得了设计的吸收器的输入入口。同样，输入允许的实际部分大约调整为与自由空间入场匹配。相反，它的假想部分在THZ吸收器的中心频率周围紧密调整为零。仅将用一种介电磁盘作为底物的材料的石墨烯磁盘（PAGD）的周期性阵列（PAGD）仅使用，这是由于有限元方法（FEM）可以使结构的吸收高于90％。作为设备的中心频率，归一化带宽在5 THz中达到了75.4％。在下一步中，我们使用CST Studio软件来验证我们设计的吸收器，它将表明数值结果将与分析方法具有最佳匹配。
In this paper, we analytically design a simple configuration of a broadband THz and polarization-insensitive absorber. The mentioned absorber consists of two layers of graphene disks, and the transmission line model is considered for the whole of the proposed absorber's structure to design it accurately. Therefore, the input admittance of the designed absorber is obtained by the transmission line model. Also, the real part of the input admittance is approximately tuned to be matched to the free space admittance. In contrast, the imaginary part of it is closely adjusted to zero around the central frequency of the THz absorber. Using only just two layers of Periodic Arrays of Graphene Disks (PAGDs) with one kind of dielectric as the material of substrates, it causes that the absorption of the structure can be achieved higher than 90 % by the Finite Element Method (FEM). Normalized bandwidth has reached up to 75.4% in 5 THz as the central frequency of the device. As the next step, we use the CST studio software to validate our designed absorber, and it will show that the numerical results will have the best matching with the analytical method.
