Analysis of transmission spectra in one-dimensional ternary photonic crystals with complex unit cell

Abstract

We investigate the light transmission spectra of a one-dimensional semiconductor ternary photonic crystal with a complex unit cell composed of different combinations of two three-layers (symmetric and asymmetric) using the transfer matrix method. The transmittance properties of such photonic crystals are analyzed numerically for the normal and oblique incidence angles of electromagnetic radiation. The complete transmission spectra for the complex ternary photonic structures have been verified from the Brewster angle. Special attention is paid to the study of light transmission spectra dependencies as a function of the thicknesses of layers in the complex unit cell. The proposed structure can be used to design the optical wide-band filters, omnidirectional reflectors at the infrared and terahertz regimes.