Graphene-based surface plasmon waveguide with the anisotropic clad

We present a new graphene-based long-range surface plasmon waveguide in this paper. The plasmon wave in this waveguide is propagated in the core enclosed between two anisotropic clads which are in the form of photonic crystal consisting of graphene layers and dielectric. We show that, using the anisotropic clad causes flexibility in the design of waveguide. Also, with the change of chemical potential of graphene we can adjust the propagation length and the confinement of plasmon wave. The results of this research are presented in the terahertz frequency range. Finally, the presented waveguide has simultaneously an acceptable propagation length and confinement.