Diagrammatic representation of the third-order polarization in transient CARS

Year: 1991

Authors: Torre R., Righini R., Angeloni L., Foggi P.

Autors Affiliation: European Laboratory for Non Linear Spectroscopy (LENS), Universitą di Firenze, Firenze, 50125, Italy; Dipartimento di Fisica, Universitą di Firenze, Firenze, 50125, Italy; European Laboratory for Non Linear Spectroscopy (LENS), Universitą di Firenze, Firenze, 50125, Italy; Dipartimento di Chimica, Universitą di Firenze, Firenze, 50121, Italy

Abstract: A diagrammatic perturbative approach is adopted to derive the expression for the third-order polarization, P(3) which originates the anti-Stokes emission in a time-resolved CARS experiment. The various contributions to P(3) are calculated assuming that laser fields are off-resonance with respect to any electronic level of material system. The resonant part of the polarization consists of two terms, in which the roles of the pump and probe pulses at frequency ?1 are exchanged. The global expression allows the direct calculation of the signal time profile in a transient CARS experiment once a model is assumed for the laser pulse shape.

Journal/Review: NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS

Volume: 13 (6)      Pages from: 809  to: 819

KeyWords: CARS; Optical transient phenomena (including quantum beats, dephasings and revivals photon echoes, free induction decay, and optical nutation); Stimulated Raman scattering and spectra; Ultrafast optical techniques
DOI: 10.1007/BF02452227

Citations: 1
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