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Raman depolarization ratio of liquids probed by linear polarization coherent anti‐Stokes Raman spectroscopy
Author(s) -
Munhoz F.,
Brustlein S.,
Gachet D.,
Billard F.,
Brasselet S.,
Rigneault H.
Publication year - 2009
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2289
Subject(s) - depolarization ratio , raman spectroscopy , coherent anti stokes raman spectroscopy , polarization (electrochemistry) , laser linewidth , coherent spectroscopy , raman scattering , isotropy , linear polarization , chemistry , depolarization , stokes parameters , spectroscopy , perpendicular , molecular physics , optics , analytical chemistry (journal) , physics , scattering , laser , quantum mechanics , medicine , geometry , mathematics , chromatography , endocrinology
We present a simple analytical model to describe the linear polarization coherent anti‐Stokes Raman scattering (CARS) spectroscopy. In this scheme, the pump and Stokes beams can have arbitrary linear polarization states and the CARS emitted signal is analyzed along two perpendicular directions. We concentrate on isotropic media without electronic resonances and show that only two polarization CARS measurements performed at the peak and the dip of a CARS spectrum are sufficient to deduce the Raman depolarization ratio, the resonant versus nonresonant contribution, the Raman resonance frequency and the linewidth. We demonstrate the applicability of our scheme to toluene and cyclohexane solutions. Copyright © 2009 John Wiley & Sons, Ltd.