In this article, we have theoretically analyzed the variation of real and imaginary components of electric permittivity and also the variation of refractive index of the graphene material in the Terahertz frequency range. The optical characteristics of One-Dimensional Periodic Structure (1-DPS) of graphene and dielectric materials have analyzed using Transfer Matrix Method. The transfer matrix method is very eminent method to analyze the optical characteristics of 1-DPS like dispersion relation, phase velocity, group velocity, reflection, transmission and absorption characteristics, etc. The absorption characteristics of considered graphene-based multilayered periodic structure have been analyzed with the variation of chemical potential ( $$\mu_{c}$$ ) of the graphene layer. The calculated absorption spectra of considered 1-DPS at the certain threshold frequency have found high and threshold value for the high chemical potential (gate voltage) of the graphene having the large thickness of the dielectric layer. Such the high and threshold absorption property of graphene-based 1-DPS, which acts as super absorber at terahertz region of the electromagnetic spectrum, may be used for the novel super absorber applications.

中文翻译：

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一维石墨烯和介电光子晶体超吸收特性的新应用研究

在本文中，我们从理论上分析了介电常数实部和虚部的变化以及石墨烯材料在太赫兹频率范围内的折射率变化。使用传递矩阵方法分析了石墨烯和介电材料的一维周期结构 (1-DPS) 的光学特性。传递矩阵法是分析1-DPS的色散关系、相速度、群速度、反射、透射和吸收特性等光学特性的非常重要的方法。 分析了所考虑的基于石墨烯的多层周期结构的吸收特性随着石墨烯层化学势（ $$\mu_{c}$$ ）的变化。在特定阈值频率下所考虑的 1-DPS 的计算吸收光谱发现具有大厚度介电层的石墨烯的高化学势（栅极电压）的高阈值。这种基于石墨烯的 1-DPS 的高吸收特性和阈值吸收特性，在电磁光谱的太赫兹区域充当超级吸收剂，可用于新型超级吸收剂应用。