Hybrid Plasma-Graphene Elliptical Structures: An Analytical Approach

Abstract

In this article, a new theoretical model is proposed for general plasma-based elliptical structures with graphene layers. The figure of merit (FOM) of a graphene-based elliptical waveguide, forming graphene-InSb-graphene-SiO2-Si layers, is calculated and studied at the frequency range of 30–50 THz. Only the first two Surface Plasmon Polariton (SPP) modes are studied in this paper. The proposed waveguide can support tunable, non-reciprocal SPPs in which their modal properties are varied by chemical potential and the external magnetic field. At the frequency of 40 THz, the FOM of 139 for this waveguide is reported for the B = 1 T and µc = 0.9 eV. The authors believe that the integration of graphene layers and gyro-electric materials can open new research areas in tunable non-reciprocal devices in the mid-infrared region.