Modelling of 2-D Gallium Nitride (GaN) photonic crystal

Abstract

This paper presents the simulation of a photonic crystal (PhC) cavity in low index contrast materials- Gallium Nitride on the sapphire substrate using two-dimensional (2D) Finite Difference Time Domain method (FDTD). We have performed the simulation based on H1 PhC configurations with the variation of lattice constant. We have obtained the quality factor of approximately 2200 and 1700 at the wavelength in the range of 486 and 483 nm respectively, which are suitable for operation of the blue laser. This configuration will be used as a basic building block for Lab-on-Chip (LoC) biosensors.