Abstract
We report on low-threshold and narrow linewidth intensity feedback random lasing in rhodamine 6G dye-doped polyurethane with dispersed nanoparticles. Depending on the dye/particle concentration, the lasing threshold is , and the linewidth is 4–6 nm. The lasing threshold as a function of nanoparticle concentration is found to follow a power law with an exponent of , which is within uncertainty of Burin et al.’s theoretical prediction [Phys. Rev. Lett. 87, 215503 (2001)] [CrossRef] .
© 2014 Optical Society of America
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