The transition from incoherent to coherent random laser in defect waveguide based on organic/inorganic hybrid laser dye

Abstract

Abstract This paper systematically demonstrated a variety of experimental phenomena of random lasers (RLs) of N,N′‐di‐(3‐(isobutyl polyhedral oligomeric silsesquioxanes)propyl) perylene diimide (DPP) organic/inorganic hybrid laser dye, which is composed of perylene diimide (PDI) as gain media and polyhedral oligomeric silsesquioxanes (POSS) as scattering media at a mole ratio of 1:2. In this work, we observe the transition from incoherent RL in the DPP‐doped solutions and polymer membrane systems using dip‐coating method to coherent RL in the polymer membrane system with defect waveguide using semi‐polymerization (SP) coating method. Meanwhile, we found that the hybrid dye‐DPP has a long lasing lifetime compared with the traditional laser dyes, which indicates that the POSS group can suppress the photo‐bleaching effect to extend the working life of laser dyes.