Lattice Structure Dependent Modulation of Photonic Band Gap in Gallium Phosphide Based 2D Photonic Crystal

In this study, we have reported the characteristics of gallium phosphide (GaP) based photonic crystals (PCs) for different lattice structures. To explore the variation of band gap with the changes of lattice configuration, three different types of configurations, triangular, hexagonal and honeycomb lattice structures for both hole and rod variant have been considered in this study. Moreover, we have presented a comparative analysis of the band gap data for different structures and found a wide band gap in the range of 103.773 THz to 340.91 THz in GaP based photonic crystals. To justify the mechanisms responsible for this band gap, we have analyzed the difference in the concentration factor of magnetic field distribution in the air and dielectric bands. This study includes gap-map for GaP based PCs required to design photonic crystal with a particular band gap at the desired frequency regime. Our study will promote the uses of GaP based PCs in various fiber optics and far-infrared applications.