Performance analysis of 2D photonic crystal with line defect

Abstract

Photonic crystal is a periodic arrangement of dielectric rods positioned in air at optimal spacing. Photonic crystal properties depend on the geometrical parameters such as material, radius of rods, lattice constant etc. This paper examines Photonic Band Gap (PBG) due to change in radius of rods and lattice constant of 2D photonic crystal structure. A detailed study of the PBG of 2D photonic crystal structure has been presented using Finite Element Method (FEM). A line defect is introduced into the photonic crystal structure and its impact on PBG has been investigated. The results show that after increase in radius of rods PBG becomes wider, whereas increase in lattice constant decreases the width of bandgap.