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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 5 — May. 1, 2011
  • pp: 1118–1123

Dependence of random laser emission on silver nanoparticle density in PMMA films containing rhodamine 6G

Christian Tolentino Dominguez, Rogério L. Maltez, Roberto M. S. dos Reis, Luciana S. A. de Melo, Cid B. de Araújo, and Anderson S. L. Gomes  »View Author Affiliations


JOSA B, Vol. 28, Issue 5, pp. 1118-1123 (2011)
http://dx.doi.org/10.1364/JOSAB.28.001118


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Abstract

We report experiments on random lasers based on films of poly(methyl methacrylate) containing rhodamine 6G and silver nanoparticles (NPs). The films were deposited on an aluminum-coated substrate that provides reinjection of leaking photons. The results show strong dependence of the emission on the silver NPs’ density and smaller linewidth and threshold due to the feedback provided by the aluminum film. For comparison purposes, samples with TiO 2 NPs were also prepared, and no evidence of random lasers was obtained for the same experimental conditions. This demonstrates that higher optical gain for lasing is obtained using silver NPs mainly due to the contribution of localized surface plasmons in the NPs.

© 2011 Optical Society of America

OCIS Codes
(140.2050) Lasers and laser optics : Dye lasers
(160.5470) Materials : Polymers
(260.2160) Physical optics : Energy transfer
(290.4210) Scattering : Multiple scattering
(300.2530) Spectroscopy : Fluorescence, laser-induced
(310.0310) Thin films : Thin films

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: February 22, 2011
Manuscript Accepted: February 24, 2011
Published: April 15, 2011

Virtual Issues
Vol. 6, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Christian Tolentino Dominguez, Rogério L. Maltez, Roberto M. S. dos Reis, Luciana S. A. de Melo, Cid B. de Araújo, and Anderson S. L. Gomes, "Dependence of random laser emission on silver nanoparticle density in PMMA films containing rhodamine 6G," J. Opt. Soc. Am. B 28, 1118-1123 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-5-1118

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