Ail-optically controllable random laser based on a dye-doped liquid crystal added with a photoisomerizable dye

摘要

This study investigates an ail-optically controllable random laser in a dye-doped liquid-crystal (DDLC). The all-optical controllability is attributable to isothermal N↔I phase transitions of LCs due to trans↔cis isomerizations of azo-dye, which can vary spatial fluctuations of dielectric property of LCs, subsequently change the losing intensity of the random laser.