Electrodynamic and Probabilistic Calculation of Performances of THz devices Based on Periodic Mtilayer Graphene-Dielectric Structures

摘要

Numerical approaches for simulation of nanophotonic metadevices based on multilayer graphene metamaterials and metasurfaces are developed to solve the Maxwell`s equations rigorously with a model of the graphene surface conductivity determined from the Kubo formula. Using two methods, such as the approximate boundary conditions and volume integrodifferential equation approaches, the results of numerical modeling of reconfigurable terahertz (THz) broadband absorbers and reflection polarizers based on multilayer metasurfaces of rectangular graphene nanoribbons at the resonant THz frequencies were obtained. Using the deterministic electrodynamic model based on the autonomous blocks with Floquet channels (FABs) and the probabilistic model, the performances (including sensitivity to the casual changing of thickness of dielectric layers) of THz filters based on the periodic multilayer graphene-dielectric metamaterial, for the different number of layers and values of chemical potential were obtained.