Raman mode random lasing in ZnS-β-carotene random gain media

Bingi, Jayachandra; Warrier, Anita R.; Vijayan, C.
June 2013
Applied Physics Letters;6/3/2013, Vol. 102 Issue 22, p221105
Academic Journal
Raman mode random lasing is demonstrated in ZnS-β-carotene random gain media at room temperature. A self assembled random medium is prepared with ZnS sub micron spheres synthesized by homogeneous precipitation method. β-Carotene extracted from pale green leaves is embedded in this random medium. The emission band of ZnS random medium (on excitation at 488 nm) overlaps considerably with that of β-carotene, which functions as a gain medium. Here, random medium works as a cavity, leading to Raman mode lasing at 517 nm and 527 nm triggered by stimulated resonance Raman scattering.


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