Polarization properties of a symmetrical and asymmetrical nonreciprocal chiral photonic bandgap structure with defect

TL;DR

This paper investigates how polarization properties of nonreciprocal chiral photonic structures, both symmetrical and asymmetrical, depend on various parameters using transfer-matrix methods and numerical simulations.

Contribution

It introduces a transfer-matrix approach to analyze polarization in nonreciprocal chiral photonic structures with defects, including symmetrical and asymmetrical configurations.

Findings

Reflection and transmission depend on frequency, chirality, and nonreciprocity.

Structural symmetry affects polarization behavior.

Numerical results illustrate parameter influences on optical properties.

Abstract

The polarization properties of perfectly periodical and defective one-dimensional photonic bandgap structures with nonreciprocal chiral (bi-isotropic) layers are studied. The method of solution is based on the 2x2-block-representation transfer-matrix formulation. Numerical simulations are carried out for different type of structures (symmetrical or asymmetrical) in order to reveal the dependence of the reflection and transmission coefficients on frequency, chirality, nonreciprocity parameters, and the angle of wave incidence.