Abstract

We report on low-threshold and narrow linewidth intensity feedback random lasing in rhodamine 6G dye-doped polyurethane with dispersed ZrO2 nanoparticles. Depending on the dye/particle concentration, the lasing threshold is 6.815.4MW/cm2, 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 0.496±0.020, 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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