Investigation of the Radially Anisotropic Semiconductor Waveguide with Graphene Layers

The paper investigates radial anisotropic semiconductor waveguides with graphene layers. The research examines the influence of graphene layers on the propagation constant of semiconductor multilayer waveguide by analyzing wave attenuation constant and phase coefficient variations. Possibilities to change waveguide characteristics by electrically changing properties of graphene are investigated and presented. Graphene tuning is modeled by adjusting its conductivity by electrically changing its electrochemical potential and calculating dielectric permittivity, which is needed for modeling. Phase and attenuation characteristics of main and first, and other higher modes are presented. The lowest cut-off frequency received for the main mode is 5.9844 THz, when the electrochemical potential of graphene is 0.05 eV, the highest cutoff frequency received is 8.1013 THz, when the electrochemical potential of graphene is 0.2 eV. The analysis of characteristics shows possibilities for dynamical tuning and reconfigurability.