Thermal lens spectrum of organic dyes using optical parametric oscillator

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 i...

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Bibliographic Details
Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2003-02, Vol.59 (3), p.487-491
Main Authors: Kurian, Achamma, Unnikrishnan, K.P., George, D.Sajan, Gopinath, Pramod, Nampoori, V.P.N., Vallabhan, C.P.G.
Format: Article
Language:English
Subjects:
Coloring Agents - chemistry
Gentian Violet - chemistry
Laser dyes
Methanol
Nonradiative relaxation
OPO
Optics and Photonics - instrumentation
Rhodamines - chemistry
Solvents
Spectrometry, Fluorescence
Spectrophotometry
Thermal lens
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Summary: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.
ISSN:1386-1425
DOI:10.1016/S1386-1425(02)00192-0