Subgridding Boundary Conditions to Model Arbitrarily Dispersive Thin Planar Materials

In a previous work, we presented a hybrid implicit-explicit Crank-Nicolson finite-difference time-domain method for treating multilayered lossy thin slabs. The main advantage of this method was its capability to overcome certain late-time stability issues of the conventional surface impedance boundary condition approaches. In this communication, we extend this method to deal with thin slabs having...