Absolute photonic band gap in a two-dimensional square lattice of square dielectric rods in air

Abstract

We show that an absolute photonic band gap exists in a two-dimensional square lattice of square dielectric rods in air. The index of refraction of the square dielectric rods must be larger than 2.65 to have the band gap. This structure is a good candidate for two-dimensional photonic crystals in the IR or the visible to near-IR wavelength range, and can be applied to high efficiency optoelectronic devices.