| 12005603 |
Saito S, Ohmine I: Off-resonant fifth-order response function for two-dimensional Raman spectroscopy of liquids CS2 and H2O. Phys Rev Lett. 2002 May 20;88(20):207401. Epub 2002 Apr 30.
The off-resonant fifth-order response functions for two-dimensional (2D) Raman spectroscopy of molecular liquids CS2 and H2O are investigated by using molecular dynamics calculation. This spectroscopy, able to deal with a phase space dynamics, shows the existence of nodal lines in several polarization tensor elements [see L. Kaufman et al., Phys. Rev. Lett. 88, 207402 (2002) for experimental results]. The nodal property is found to arise from the dynamical couplings among rotational modes, not accounted for in a normal mode picture. The effects of anharmonicities and "mode coupling through polarizability" are also investigated by comparing the 2D Raman signal with a constant temperature velocity reassignment echo method. |
2(0,0,0,2) |