A brief report on photonic crystals and calculations using the mechanism of strong localization of light

A brief description of a new class of strongly scattering dielectric micros tructures. also called photonic material is given. These crystals are specu lated to be of fundamental importance in the present day technology like se miconductors. The main theoretical and experimental developments are given. We have also calculated relative width of the Photonic band gap as a funct ion of refractive index and a comparison is given for the close packed and diamond lattice of fee 3-D structure. The characteristics of liquid crystal as Photonic crystal are re-analyzed. This work may be fruitful for the inv estigators in the field of Photonic Crystals.