Tunability and enlargement of omnidirectional transmission frequency range in a photonic heterostructure containing Dirac semimetal

Abstract

In this study, We theoretically realized the enlargement of the photonic crystal band gap by a photonic heterostructure containing Dirac semimetal layer. At the same time, since the dielectric constant of the Dirac semimetal changes with its Fermi level, based on this characteristic, we have realized the adjustment of the band gap of the enlarged photonic crystal. Comparing a single photonic crystal with a heterostructure photonic crystal, it is found that the photonic band gap of the heterostructure photonic crystal is significantly enlarged, and then the effects of different incident angles and polarized waves on the photonic band gap are analyzed. Based on the above properties, it has potential applications in tunable photonic crystal devices.