A simple plane wave source for the 3D-FDTD simulation of dispersive layered media

In this paper, a simple and efficient plane wave excitation method for 3-D finite-difference time-domain simulation of dispersive layered media is proposed. A 1-D auxiliary simulation and total-field/scattered-field method are used with closed boundary to introduce the plane wave. The total-field/scattered-field simulation with closed boundary makes the near-field to far-field transformation possible. Stored 1-D auxiliary simulation data file can be used in iterative simulations of same geometry without repetition of same 1-D simulations.