Mechanisms of dephasing in femtosecond time-resolved coherent Raman scattering from molecules in liquids

摘要: Abstract The mechanisms of ultrafast dephasings appearing in the time-profile coherent Raman scattering from molecules liquids are examined. Two taken into account. One is associated with intermolecular interactions between at different sites through heat bath modes. other interference rovibrational transitions. In former mechanism, time profile characterized by an exponential decay. This decay constant called dephasing constnt. For latter has inhomogeneous nature and a Gaussian form. structure derived within Narkov approximation. We describe relationship intramolecular spontaneous Finally we analyze ultrafast, sub-picosecond observed anti-Stokes profiles neat benzene liquid terms mechanism.