Polarization properties of coherent anti‐stokes Raman spectra (CARS) in isotropic liquids

Linearly polarized excitation has been used to obtain CARS and CSRS spectra of some simple liquids and of cytochrome C in dilute solution. The data are described in terms of the depolarization ratio of conventional Raman spectroscopy. The symmetry properties of the third‐order susceptibility are shown to be maintained under conditions of electronic resonance.