Tailoring the Chirality of Microlaser with Topological Structured Chiral Droplets

TL;DR

This paper demonstrates a method to control the chirality of microlaser emission using topologically structured chiral liquid crystal droplets, enabling tunable chiral light sources for advanced photonic applications.

Contribution

It introduces a novel approach to manipulate laser chirality in microcavities through topological transformations in chiral droplets, supported by theoretical analysis and simulations.

Findings

Topological transformations induce different optical chirality strengths.

Lasing intensity varies significantly with circular polarization excitation.

The method offers a new tool for chiral photonics and molecular detection.

Abstract

The generation of chiral laser emission offers promising opportunities for modern photonic applications and the study of chiral light-mater interactions. Despite the great process made in recent years, the direct generation of chiral lasers with controllable chirality remains challenging in a microcavity. This study reports a strategy to control the emission chirality of whispering-gallery-mode organic microlasers with topological-structured chiral liquid crystal droplets. The findings suggest that the topological transformations in a microdroplet can induce different optical chirality strength and lasing polarization characteristics. In particular, the role of optical rotatory power was also investigated under linear and circular polarized excitation, where a vast lasing intensity difference between left/right circular polarized excitation was revealed. Theoretical analysis and simulation were carried out to support the significant findings. This study provides a facile tool for manipulating chiral laser emissions in microcavity, giving inspiration for topological-controlled photonics, chiral optical devices, and chiral molecular detection.