A surface impedance boundary condition approach to the FDTD modeling of graphene

Graphene is a promising material for many applications, and electromagnetic modeling for graphene is needed to aid the design of graphene based devices. We present an approach for the finite-difference time-domain (FDTD) simulation of graphene improving on accuracy and computational efficiency. This is accomplished using a surface impedance boundary conditions (SIBC) to model graphene as a surface, eliminating the need to simulate the interior of the material. The vector-fitting technique is used in conjunction with FDTD to achieve accurate response over a broad range of frequencies.