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Article Dans Une Revue Physical Review A Année : 2013

Field-free molecular alignment for probing collisional relaxation dynamics

Résumé

We report the experimental study of field-free molecular alignment in CO2 gas mixtures induced by intense femtosecond laser pulses in the presence of collisional processes. We demonstrate that the alignment signals exhibit specific features due to nontrivial collisional propensity rules that tend to preserve the orientation of the rotational angular momentum of the molecules. The analysis is performed with a quantum approach based on the modeling of rotational J- and M-dependent state-to-state transfer rates. The present work paves the way for strong-field spectroscopy of collisional dynamics.
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Dates et versions

hal-04114092 , version 1 (01-06-2023)

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Th. Vieillard, F. Chaussard, F. Billard, D. Sugny, O. Faucher, et al.. Field-free molecular alignment for probing collisional relaxation dynamics. Physical Review A, 2013, 87, ⟨10.1103/PhysRevA.87.023409⟩. ⟨hal-04114092⟩
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