Band gap analysis of graphene-plasmonic photonic crystals based on Gaussian beams

Abstract

In this paper, a composite periodic structure of graphene-plasma photonic crystal based on a Gaussian beam is designed. The transmission coefficient of graphene-plasma photonic crystal is calculated by using the modified transmission matrix method. Combined with COMSOL finite element software, the effects of plasma parameters and structural periods on the photonic band gap are analyzed. The results show that with the increase of electron density, the band gap widens and deepens, and the band gap center moves to high frequency. In addition, with the increase in the number of periodic structures, the position and width of the first photonic band gap are slightly affected, but the overall band gap transmittance will decrease. Therefore, compared with ordinary dielectric photonic crystals, graphene-plasma photonic crystals have more tunable parameters to control the photonic band gap, which provides a theoretical reference for the study of intelligent regulation of photonic crystals.