Normal mode coupling and Bloch states in elliptically birefringent 1D photonic crystals

TL;DR

This paper analyzes how local polarization variations in elliptically birefringent 1D photonic crystals influence mode coupling, dispersion relations, and the nature of Bloch states, revealing complex wave behavior.

Contribution

It introduces a detailed analysis of mode coupling effects caused by polarization state variations in elliptically birefringent layered structures.

Findings

Mode coupling arises from local polarization state changes.

Dispersion relations are significantly affected by birefringence.

The character of Bloch states is altered by polarization variations.

Abstract

An analysis is presented of frequency versus wave-vector dispersion in elliptically birefringent one-dimensional layered periodic structures. The presence of local normal mode polarization state variations from one layer to the next is found to lead to mode coupling and to affect the wave-vector dispersion and the character of the Bloch states of the system.