Paper detail

Tailoring the Chirality of Microlaser with Topological Structured Chiral Droplets

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.