Classification of degenerate and non-degenerate modes of Photonic Crystals in FDTD analysis by group theory

Abstract

In recent years, Photonic Crystals (PCs) are widely applied in microwave engineering, antenna engineering and so on. Properties of PCs are often analyzed by the FDTD method. Propagation modes of PCs are one of the important properties. However, FDTD method cannot distinguish degenerate or non-degenerate mode due to its calculation procedure. This paper proposed a classification technique of the degenerate and non-degenerate mode in the FDTD analysis of PCs using a group theory.