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High‐precision femtosecond CARS of simple liquids
Author(s) -
Fickenscher M.,
Laubereau A.
Publication year - 1990
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.1250211215
Subject(s) - dephasing , femtosecond , degenerate energy levels , raman spectroscopy , chemistry , bromoform , spectrometer , acetonitrile , resolution (logic) , analytical chemistry (journal) , atomic physics , molecular physics , laser , optics , physics , organic chemistry , quantum mechanics , artificial intelligence , chloroform , computer science
Abstract A novel non‐degenerate CARS spectrometer is described with an 80‐fs time resolution, improved measuring accuracy of ca . 1% for the vibrational dephasing time and adjustable frequency positions of the input pulses. Experimental data are reported for CH stretching vibrations of acetone, acetonitrile and bromoform. Negligible inhomogeneous broadening (<4%) is deduced from the observed exponential decay for the vibrational transitions. The effect of orientational motion on the dephasing observations is discussed.