Shaping of secondary light pulses by molecules (Rayleigh scattering and fluorescence)

John L. Carlsten, A. Szöke

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.

RAYLEIGH

V.A. Morosov, Yu. V. Gutop

V. A. Morozov, Yu. V. Gutop, P. P. Shorygin

This paper examines the energy redistribution between a pulse of incident light, a molecule, and a pulse of secondary radiation by considering the transformation of light in a closed system: the radiation field and the molecule. The analysis is carried out using Hamiltonians. The energy balance and the shape of short secondary radiation pulses during the transformation of sufficiently weak light pulses are determined basically by the fast energy exchange between the molecule and the radiation field. The energy transferred from radiation field modes to the molecule and back to these modes is much larger than the energy dissipated by the molecule into the other modes of the field.

V. I. Bespalov, A. M. Kubarev, Guerman A. Pasmanik