Stimulated emission in high-gain organic media
- 15 February 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 59 (8), R5284-R5287
- https://doi.org/10.1103/physrevb.59.r5284
Abstract
Stimulated emission was studied in various scattering gain media, including thin π-conjugated polymer films, organic dyes-doped gel films, and opal crystals saturated with polymer and laser dye solutions. We found that at high excitation intensities a featureless amplified spontaneous emission band transforms into a finely structured spectrum having features as narrow as 0.1 nm. Stimulated emission in this regime is directional and characterized by a linear laserlike intensity dependence. We speculate that this phenomenon is due to optical feedback caused by light scattering inside the inhomogeneous gain media.Keywords
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