期刊
ACS PHOTONICS
卷 5, 期 3, 页码 1026-1033出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.7b01329
关键词
light-emitting nanofibers; random lasers; nanolasers; titania nanoparticles; mode-correlation; waveguides; electrospinning
类别
资金
- European Research Council under the European Union [306357]
- Fund for Development and Cohesion APQ Apulia Region Research Regional program for smart specialization and social and environmental sustainaibility [YP9DNY7]
- Research Council of Lithuania [LJB-3/2015]
Random lasers are based on disordered materials with optical gain. These devices can exhibit either intensity or resonant feedback, relying on diffusive or interference behavior of light, respectively, which leads to either coupling or independent operation of lasing modes. We study for the first time these regimes in complex, solid-state nanostructured materials. The number of lasing modes and their intensity correlation features are found to be tailorable in random lasers made of light-emitting, electrospun polymer fibers upon nanoparticle doping. By material engineering, directional waveguiding along the length of fibers is found to be relevant to enhance mode correlation in both intensity feedback and resonant feedback random lasing. The here reported findings can be used to establish new design rules for tuning the emission of nanolasers and correlation properties by means of the compositional and morphological properties of complex nanostructured materials.
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