The Origin of Vibrational Dephasing in Liquids and Solids
The dephasing of an ensemble of vibrating molecules results from molecular interactions which frequently occur on an extremely fast time scale. Vibrational dephasing times in condensed media are typically on the order of picoseconds; this fact, and the difficulties inherent in describing a molecule in dense matter, would seem to constitute serious obstacles to the understanding of dephasing processes. Nevertheless, several theoretical models for dephasing have been presented,  and new experimental methods using picosecond lasers have been developed . In our recent work ,  we have emphasized the role of energy exchange in vibrational dephasing. This exchange model is attractive both for its easy experimental realization, and for its usefulness in obtaining important molecular parameters and identifying the important dephasing channels.
KeywordsStimulate RAMAN Scattering Probe Pulse Picosecond Laser Anharmonic Oscillator Fast Time Scale
Unable to display preview. Download preview PDF.
- 2.A. Laubereau and W. Kaiser, in Chemical and Biochemical Applications of Lasers, C. B. Moore, ed. (Academic Press, 1976).Google Scholar
- 4.C. B. Harris, R. M. Shelby and P. A. Cornelius, Chem. Phys. Lett., in press.Google Scholar
- 6.R. M. Shelby, C. B. Harris and P. A. Cornelius, J. Chem. Phys., submitted.Google Scholar