Optics and Photonics Society of Iran

In this paper the effect of graphene nano-layers on the transmission properties of a defective one-dimensional photonic crystal have been investigated using the transfer matrix method. It is shown that two kinds of the defect modes can be found in the band gaps of the structure. One kind is the traditional defect mode which is created in the Bragg gaps of the structure and is due to the breaking of the periodicity of the dielectric lattice. The other one is created in the graphene induced band gap. Such a defect mode which we call it the graphene induced defect mode (GIDM) is due to the breaking of the periodicity of the graphene lattice. However, our investigations reveal that only in the case of wide defect layers one can obtain the graphene induced defect modes. Since the permittivity of graphene nano-layer depends on its chemical potential, the frequency of the GIDMs can be controlled via a gate voltage.