Spectral and temporal measurements of laser action of Rhodamine 640 dye in strongly scattering media.
作者： W. L. Sha , C.-H. Liu , R. R. Alfano
DOI: 10.1364/OL.19.001922
关键词:
摘要: Laser action of Rhodamine 640 perchlorate in highly scattering media consisting TiO2 nanoparticles methanol pumped by a 3-ns 532-nm laser pulse is observed use spectral and temporal measurements. The threshold for stimulated emission dependent on the concentration both dye particles. For 2.5 × 10−2 M concentration, lasing was found to be reduced more than 2 orders magnitude when density particles increased from 5 109 1012 cm−3. However, 10−4 higher host. duration these random systems ~50 ps.
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