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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2007

Optical gratings induced by field-free alignment of molecules

Résumé

We analyze the alignment of molecules generated by a pair of crossed ultra-short pump pulses of different polarizations by a technique based on the induced time-dependent gratings. Parallel polarizations yield an intensity grating, while perpendicular polarizations induce a polarization grating. We show that both configurations can be interpreted at moderate intensity as an alignment induced by a single polarized pump pulse. The advantage of the perpendicular polarizations is to give a signal of alignment that is free from the plasma contribution. Experiments on femtosecond transient gratings with aligned molecules were performed in CO2 at room temperature in a static cell and at 30 K in a molecular expansion jet.
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Dates et versions

hal-00397076 , version 1 (19-06-2009)

Identifiants

Citer

A. Rouzée, V. Renard, S. Guérin, O. Faucher, B. Lavorel. Optical gratings induced by field-free alignment of molecules. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2007, 75 (1), pp.013419. ⟨10.1103/PhysRevA.75.013419⟩. ⟨hal-00397076⟩
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