Premium
Temperature measurements in condensed phases using non‐resonant femtosecond stimulated Raman scattering
Author(s) -
Dang N. C.,
Bolme C. A.,
Moore D. S.,
McGrane S. D.
Publication year - 2013
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.4215
Subject(s) - femtosecond , raman spectroscopy , raman scattering , picosecond , coherent anti stokes raman spectroscopy , chemistry , analytical chemistry (journal) , scattering , molecular physics , nuclear magnetic resonance , materials science , optics , physics , laser , chromatography
We have previously demonstrated the capability of femtosecond stimulated Raman scattering (FSRS) data to measure the temperature ( T ) of condensed matter at the molecular vibrational level. [ Phys. Rev. Lett . 2011, 107 , 43001] In this paper, we expand the theory for the FSRS temperature dependence by considering the effects of an isolated change of T as well as a coupled change of T and chemical concentration. We point out that the origin of the temperature sensitivity of the Stokes to anti‐Stokes ratio of FSRS lies in the exponential nonlinearity of the gain and loss. We establish that FSRS of two Raman modes can be used to simultaneously determine the vibrational temperature and the change in concentration of the species contributing to those two modes. Single‐shot experimental results using FSRS are presented to demonstrate over four orders of magnitude higher efficiency than spontaneous Raman in small volume samples with picosecond resolution. Copyright © 2012 John Wiley & Sons, Ltd.