Stimulated Rayleigh Scattering in Liquids

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Abstract
The stimulated Rayleigh line has been observed in a number of liquids. It is found that a sharp Rayleigh line appears only with some degree of ellipticity in the polarization of the incident laser beam, and is best-defined with a circularly polarized beam. When the line is observed with circularly polarized light, it is circularly polarized with a sense opposite to that of the incident light for both the forward and backward scattering. Thresholds are measured for some liquids, and conditions of its appearance are studied correlating its appearance with that of the broad stimulated Rayleigh wing, stimulated Brillouin, and stimulated Raman scatterings. The observed frequency displacements are used to determine orientational relaxation times, and may be used to estimate a molecular size.

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