Photonic crystal and its application

A photonic crystal is a periodic arrangement of dielectric or metallic materials. It may offer a possibility of eliminating electromagnetic wave propagation within a frequency band, i.e., a photonic band gap. The discovery of photonic band-gap materials and their use in controlling light propagation is a new and exciting development. It has vast implications for material scientists, electrical engineers, and physicists. Recently, photonic crystals have attracted particular interest due to their important applications in optical and tele- communications. In this paper, we present some of our recent works on photonic crystals and their applications.