Mujumdar, Sushil and Ramachandran, Hema and Kumar, N and Sood, AK (2006) Evanescent-wave-excited quasi-two-dimensional random lasing. In: Optics Letters, 31 (18). pp. 2722-2724.Full text not available from this repository. (Request a copy)
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 $\sim 13$ 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.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Optical Society of America.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||23 May 2008|
|Last Modified:||27 Aug 2008 13:23|
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