6533b7d3fe1ef96bd12615c1
RESEARCH PRODUCT
Field-free molecular alignment for probing collisional relaxation dynamics
Dominique SugnyFrédéric ChaussardBruno LavorelSergey V. IvanovFranck BillardOlivier FaucherT. VieillardJean-michel HartmannChristian Bouletsubject
PhysicsAngular momentumWork (thermodynamics)Field (physics)Mechanical effects of light on atoms molecules and ions42.50.MdRelaxation (NMR)Optical transient phenomena: quantum beats photon echo free-induction decay dephasings and revivals optical nutation and self-induced transparencyLaserMolecular physicsAtomic and Molecular Physics and Opticslaw.inventionRotational and vibrational energy transferlaw[SDU]Sciences of the Universe [physics]34.50.EzFemtosecond37.10.VzSpectroscopyQuantumdescription
International audience; 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-02-14 |