Rayleigh and Raman Scattering

V. A. Morozov, P. P. Shorygin

Abstract The expressions for the pulse shapes of secondary radiation in the frequency range of Rayleigh scattering and resonance fluorescence and in the range of Raman scattering and shifted resonance fluorescence are obtained on the basis of the quantum treatment of transformation of light pulses, the resonance conditions for Raman and Rayleigh scattering being considerably different. The characteristic cases of different pulse shapes of Raman and Rayleigh scattering are considered for the condition when the molecules are irradiated by light pulses which are shorter then the lifetime of the excited state of the molecule and are weak enough not to result in saturation.

Carla Buzano, Mario Rasetti, P. T. Valabrega

Alexander A. Lisyansky, E. S. Andrianov, Alexey P. Vinogradov +1 more

Sergey A. Sorokin

It is shown that the feedback arising from the Rayleigh scattering leads to an absolute instability of the stimulated Raman effect. The conditions for the occurrence of this instability are determined and it is shown that the distributed feedback due to the Rayleigh scattering differs from the feedback in a resonator.

Alexander A. Lisyansky, E. S. Andrianov, Alexey P. Vinogradov +1 more

H. R. Sadeghpour, A. Dalgarno

An inhomogeneous differential equation method is used to calculate the Rayleigh and Raman scattering cross sections for atomic hydrogen and atomic caesium as functions of wavelengths below and above the ionization limits. The profile of the scattering cross section near the 6s-6p resonance of atomic caesium is determined by including an energy-independent radiative width in the scattering formula. The effect of replacing the electric dipole operation by a modified form that takes account of the polarization of the core by the valence electron is explored.