Implementation of the iterative finite-difference time-domain technique for simulation of periodic structures at oblique incidence

In this paper we review a recently developed finite-difference time-domain (FDTD) iterative technique for the analysis of periodic structures at oblique incidence. We show how it can be implemented in FDTD code and estimate required computer memory and time resources. To illustrate performance of our technique we demonstrate the plasmon formation in a thin gold film placed at air/glass interface and calculate reflectance from silicon textured coating at oblique incidence.