Coherent random lasing controlled by Brownian motion of the active scatterer


The stability of the scattering loop is fundamental for coherent random lasing in a dynamic scattering system. In this work, fluorescence of DPP (N, N-di [3-(isobutyl polyhedral oligomeric silsesquioxanes) propyl] perylene diimide) is scattered to produce RL and we realize the transition from incoherent RL to coherent RL by controlling the Brownian motion of the scatterers (dimer aggregates of DPP) and the stability of scattering loop. To produce coherent random lasers, the loop needs to maintain a stable state within the loop-stable time, which can be determined through controlled Brownian motion of scatterers in the scattering system. The result shows that the loop-stable time is within 5.83 × 10−5 s to 1.61 × 10−4 s based on the transition from coherent to incoherent random lasing. The time range could be tuned by finely controlling the viscosity of the solution. This work not only develops a method to predict the loop-stable time, but also develops the study between Brownian motion and random lasers, which opens the road to a variety of novel interdisciplinary investigations involving modern statistical mechanics and disordered photonics.

Publication DOI:
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: ©2018 IOP Publishing Ltd.
Publication ISSN: 1361-6455
Full Text Link:
Related URLs: http://iopscien ... 361-6455/aab7c9 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-04-16
Accepted Date: 2018-03-19
Authors: Liang, Shuofeng
Yin, Leicheng
Zhang, Zhenzhen
Xia, Jiangying
Xie, Kang
Zou, Gang
Hu, Zhijia (ORCID Profile 0000-0002-8960-5318)
Zhang, Qijin



Version: Accepted Version

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