Abstract

Hyper Raman scattering is a nonlinear effect that gives rise to a scattering signal Raman shifted relative to the second harmonic of the excitation frequency. In particular, for molecules having a high symmetry, hyper Raman spectra can provide vibrational information on so-called "silent modes" that are not obtainable in "normal" Raman scattering or infrared absorption spectroscopy'. A disadvantage of the method is its very small scattering cross section. (For a recent overview see Ref. 1.)

© 1993 Optical Society of America