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

• Main Authors: Xia Jiangying, Xie Kang, Ma Jiajun, Chen Xianxian, Li Yaxin, Wen Jianxiang, Chen Jingjing, Zhang Junxi, Wu Sizhu, Cheng Xusheng, Hu Zhijia
• Format: Article
• Language: English
• Published: De Gruyter 2018-06-01
• Series: Nanophotonics
• Subjects: random laser; hybrid laser dye; nanoparticles; coherence
• Online Access: https://doi.org/10.1515/nanoph-2018-0034
• ISSN: 2192-8606; 2192-8614

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.