title: Thermal lens spectrum of organic dyes using optical parametric oscillator.
abstract: The wavelength dependence of thermal lens signal from organic dyes are studied using dual beam thermal lens technique. It is found that the profile of thermal lens spectrum widely differ from the conventional absorption spectrum in the case of rhodamine B unlike in the case of crystal violet. This is explained on the basis of varying contribution of nonradiative relaxations from the excited vibronic levels.
authors.affiliation: International School of Photonics, Cochin University of Science & Technology, Cochin 682022, India.
authors.forename: Achamma
authors.initials: A
authors.lastname: Kurian
authors.forename: K P
authors.initials: KP
authors.lastname: Unnikrishnan
authors.forename: D Sajan
authors.initials: DS
authors.lastname: George
authors.forename: Pramod
authors.initials: P
authors.lastname: Gopinath
authors.forename: V P N
authors.initials: VP
authors.lastname: Nampoori
authors.forename: C P G
authors.initials: CP
authors.lastname: Vallabhan
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D005840:Gentian Violet / Q000737:chemistry; D000432:Methanol; D055095:Optics and Photonics / Q000295:instrumentation; D012235:Rhodamines / Q000737:chemistry; D012997:Solvents; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry
chemical_list: D004396:Coloring Agents; D012235:Rhodamines; D012997:Solvents; D005840:Gentian Violet; C029773:rhodamine B; D000432:Methanol