Study of super absorption properties of 1D graphene and dielectric photonic crystal for novel applications

Abstract

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.