Absorption and Emission Dependences on Defect in CLC

TL;DR

This study investigates how the position of an isotropic defect within cholesteric liquid crystals affects their absorption and emission properties, revealing position-dependent maxima for different light polarization conditions.

Contribution

It provides new insights into defect position effects on optical properties of cholesteric liquid crystals, including anisotropic absorption influences.

Findings

Maximum absorption/emission occurs at the center for non-diffracting light.

Maximum absorption/emission occurs near the left border for diffracting light.

Anisotropic absorption impacts the photonic density of states.

Abstract

The influence of the defect position on absorption and emission in the cholesteric liquid crystal with an isotropic defect inside is studied. It is shown that for non-diffracting circularly polarized incident light absorption/emission is maximum if the defect is in the centre of the system; and for diffracting circularly polarized incident light absorption/emission is maximum if the defect is shifted from the centre of the system to its left border from where light is incident. The influence of anisotropic absorption in the cholesteric liquid crystal layer on photonic states of density was investigated, too.