Polarization Dependence of Picosecond CARS in Liquids

N. Kohles; A. Laubereau

doi:10.1364/UP.1986.WB4

Topical Meeting on Ultrafast Phenomena
Technical Digest Series (Optica Publishing Group, 1986),
paper WB4
•https://doi.org/10.1364/UP.1986.WB4

Polarization Dependence of Picosecond CARS in Liquids

N. Kohles and A. Laubereau

International Conference on Ultrafast Phenomena 1986

Snowmass, Colorado United States
16–19 June 1986
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Biology 2 (WB)

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N. Kohles and A. Laubereau, "Polarization Dependence of Picosecond CARS in Liquids," in Topical Meeting on Ultrafast Phenomena, Technical Digest Series (Optica Publishing Group, 1986), paper WB4.

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Abstract

We have performed a theoretical and experimental study of time resolved coherent Raman scattering under various polarization conditions. Three mechanisms are shown to contribute to the scattering signal in the general case: (i) scattering off the isotropic part of the resonant material excitation with vibrational dephasing time T₂. (ii) scattering from a second, oriented component of the resonant material excitation with "anisotropic" time constant τ_an (iii) four wave mixing via the non-resonant part χ_NRof the third order susceptibility.

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