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Pré-Publication, Document De Travail Année : 2004

Coherent Backscattering with Nonlinear Atomic Scatterers

Résumé

We study coherent backscattering of a quasi-monochromatic laser by a dilute gas of cold two-level atoms. We consider the perturbative regime of weak intensities, where nonlinear effects arise from {\em inelastic} two-photon scattering processes. Here, coherent backscattering can be formed by interference between {\em three} different scattering amplitudes. Consequently, if elastically scattered photons are filtered out from the photodetection signal by means of suitable frequency-selective detection, we find the nonlinear backscattering enhancement factor to exceed the linear barrier two.

Dates et versions

hal-00012414 , version 1 (22-10-2005)

Identifiants

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T. Wellens, Benoît Grémaud, D. Delande, C. Miniatura. Coherent Backscattering with Nonlinear Atomic Scatterers. 2004. ⟨hal-00012414⟩
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