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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 …
American Chemical Society
Publication date: 
18 Dec 2017

Martina Montinaro, Vincenzo Resta, Andrea Camposeo, Maria Moffa, Giovanni Morello, Luana Persano, Karolis Kazlauskas, Saulius Jursenas, Ausra Tomkeviciene, Juozas V Grazulevicius, Dario Pisignano

Biblio References: 
Volume: 5 Issue: 3 Pages: 1026-1033
ACS Photonics