Rayleigh scattering induced

The intensity of Rayleigh scattering and the linear Raman effect is governed by the polarizability tensor apa of a molecule and its derivatives with respect to the normal coordinates. When the electric field of the exciting radiation is very high, further terms in the expression for the induced dipole moment 104)... 

The fundamentals of the Raman effect can be understood by consideration of a classical model, in which an incident beam of radiation (i.e., laser beam, for all practical purposes, in flame diagnostics) passes through an ensemble of molecules. The resultant laser beam electric field distorts the electronic cloud distribution of each molecule, causing oscillating dipoles these induced dipoles are related to the incident laser beam electric field by the molecular polarizability. The dipoles, in turn, produce a secondary radiating field at essentially the same frequency as that for the incident beam. This radiation is termed Rayleigh scattering. 

When the charge of the capacitor is reversed, the induced dipole moment is also reversed. When a molecule is exposed to an alternating electric field of high frequency i>o, the induced dipole moment will also alternate with the same frequency. Thus, the molecule emits electromagnetic radiation of the frequency /(). Rayleigh scattering is due to this process. 

A. Gharbi and Y. Le Duff. Many-body correlations for Raman and Rayleigh collision induced scattering. Molec. Phys., 40 545-552 (1980). 

M. Perrot, M. Besnard, J. Lascombe, and M. Bouachir. Orientational and induced depolarized Rayleigh scattering of some anisotropic molecules in their liquid state. Canad. J. Phys., 59 1481-1486 (1981). 

G. Birnbaum. Comments on Hyper-Rayleigh Scattering. In G. Bimbaum (ed.). Phenomena Induced by Intermolecular Interactions, Plenum Press, New York, 1985, pp. 773-774. 

J. L. Carlsten and A. Szoke. Spectral resolution of near-resonant Rayleigh scattering and collision induced resonance fluorescence. Phys. Rev. Lett., 56 667-671 (1976). 

F. B. Martin and J. R. Lalanne. Agreement between depolarized Rayleigh scattering and optical Kerr effect induced by 2 S lched laser waves in some liquids. Phys. Rev. A, 4 1275-1278 (1971). 

Experimental Hyperpolarizabilities for Gas and Liquid. The usual sources of hyperpolarizability data are EFISH (Electric Field Induced Second Harmonic), the static and optical Kerr effect (KE and OKE) and hyper-Rayleigh scattering (HRS). The extraction of molecular hyperpolarizabilities from the EFISH signal requires careful analysis of the second harmonic output signal... 

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