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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 18 — Sep. 15, 2006
  • pp: 2722–2724

Evanescent-wave-excited quasi-two-dimensional random lasing

Sushil Mujumdar, Hema Ramachandran, N. Kumar, and A. K. Sood  »View Author Affiliations


Optics Letters, Vol. 31, Issue 18, pp. 2722-2724 (2006)
http://dx.doi.org/10.1364/OL.31.002722


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Abstract

We report on random lasing from a dye-scatterer system directly excited by evanescent modes formed over a dielectric–dielectric interface. The system is quasi-two-dimensional because of the subwavelength exponential decay of the excitation energy. Spectral narrowing by a factor of 13 was obtained under diffusive scattering conditions. The peak intensity exhibited a unique dual-saturation behavior due to the localized nature of the excitation. We observed a reduction of threshold for samples with a higher dye concentration because of a larger excitation-state occupation number within the same interaction volume.

© 2006 Optical Society of America

OCIS Codes
(140.2050) Lasers and laser optics : Dye lasers
(230.6080) Optical devices : Sources
(290.4210) Scattering : Multiple scattering

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: May 22, 2006
Manuscript Accepted: June 16, 2006
Published: August 25, 2006

Virtual Issues
Vol. 1, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Sushil Mujumdar, Hema Ramachandran, N. Kumar, and A. K. Sood, "Evanescent-wave-excited quasi-two-dimensional random lasing," Opt. Lett. 31, 2722-2724 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-18-2722

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