Random lasing in weakly scattering systems

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dc.contributor.author Wu, X en_US
dc.contributor.author Fanag, W en_US
dc.contributor.author Yamilov, A en_US
dc.contributor.author Chabanov, Andrey en_US
dc.contributor.author Asatryan, Ara en_US
dc.contributor.author Botten, Lindsay en_US
dc.contributor.author Cao, H en_US
dc.date.accessioned 2009-06-26T04:10:35Z
dc.date.available 2009-06-26T04:10:35Z
dc.date.issued 2006 en_US
dc.identifier 2006005630 en_US
dc.identifier.citation Wu X et al. 2006, 'Random lasing in weakly scattering systems', American Physical Society, vol. 74, no. 5, pp. 053812-1-053812-11. en_US
dc.identifier.issn 1050-2947 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/504
dc.description.abstract We present detailed experimental and numerical studies of random lasing in weakly scattering systems. The interference of scattered light, which is weak in the passive systems, is greatly enhanced in the presence of high gain, providing coherent and resonant feedback for lasing. The lasing modes are confined in the vicinity of thepumped volume due to absorption of emitted light outside it. In the ballistic regime where the size of the gain volume is less than the scattering mean free path, lasing oscillation occurs along the direction in which the gain volume is most extended, producing directional laser output. The feedback for lasing originates mainly from backscattering of particles near the boundaries of the pumped region. It results in nearly constant frequency spacing of lasing modes, which scales inversely with the maximum dimension of the gain volume. en_US
dc.publisher American Physical Society en_US
dc.title Random lasing in weakly scattering systems en_US
dc.parent Physical Review A en_US
dc.journal.volume 74 en_US
dc.journal.number 5 en_US
dc.publocation USA en_US
dc.identifier.startpage 053812-1 en_US
dc.identifier.endpage 053812-11 en_US
dc.cauo.name SCI.Mathematical Sciences en_US
dc.conference Verified OK en_US
dc.for 020500 en_US
dc.personcode 0000028727 en_US
dc.personcode 0000028728 en_US
dc.personcode 0000028729 en_US
dc.personcode 0000028730 en_US
dc.personcode 010655 en_US
dc.personcode 780055 en_US
dc.personcode 0000028731 en_US
dc.percentage 50 en_US
dc.classification.name Optical Physics en_US
dc.classification.type FOR-08 en_US
dc.description.keywords light interference, optical feedback, light scattering, laser modes, light absorption, particle backscattering, random processes en_US


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