The Dispersive WCS-FDTD Method for Simulations of Graphene

A dispersive weakly conditionally stable finite-difference time-domain (WCS-FDTD) method is presented in this paper for the efficient simulations of the graphene with fine structures in two directions. The maximum time step size of the proposed method is only related with the largest spatial discretization, so it is very suitable for the simulations of the graphene-based devices with fine structures in two directions. The numerical results demonstrate that the dispersive WCS-FDTD method has high computational accuracy and is much efficient than the dispersive HIE-FDTD method and the dispersive FDTD method.