We present a tunable multistacked metamaterial‐based graphene grating structure for the lower THz frequency range. Circular gold wire is placed between graphene layers to obtain wideband response. Reflectance, transmittance, absorption, and refractive index parameters are analyzed for metamaterial‐based graphene grating structure. The results show wideband reflectance response ranging from 1 to 2.5 THz frequency. Reflectance in grating can be controlled by different chemical potentials of the graphene sheet. The design results are also analyzed for different incident angles ranging from 0° to 80°. The proposed grating structure has the wideband tunable reflectance response and is envisioned to become basic building blocks of several THz systems which is going to be applicable in circulator, sensor, and imaging applications.

中文翻译：

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可调多堆叠基于超材料的石墨烯光栅的数值研究

我们为较低的THz频率范围提供了一种可调谐的基于多材料的基于超材料的石墨烯光栅结构。将圆形金线放置在石墨烯层之间以获得宽带响应。分析了基于超材料的石墨烯光栅结构的反射率，透射率，吸收率和折射率参数。结果表明，宽带反射率响应的频率范围为1到2.5 THz。光栅中的反射率可以通过石墨烯片的不同化学势来控制。还针对0°至80°范围内的不同入射角分析了设计结果。所提出的光栅结构具有宽带可调的反射率响应，并有望成为几种太赫兹系统的基本构建模块，这些系统将适用于循环器，传感器和成像应用。