6533b7d5fe1ef96bd12648c5
RESEARCH PRODUCT
Probing ultrafast thermalization with field-free molecular alignment
Jean-michel HartmannEdouard HertzOlivier FaucherJ. HouzetChristian BouletJ. GateauBruno LavorelFranck Billardsubject
Physicscollisional dynamics010304 chemical physicsField (physics)ultrafast nonlinear optics[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph][ PHYS.PHYS.PHYS-ATOM-PH ] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]femtosecond phenomenaRelaxation (NMR)ultrafast relaxationTracking (particle physics)Laser01 natural sciences37.10.Vz 34.50.Ez 42.50.MdAtomic and Molecular Physics and Opticslaw.inventionPulse (physics)Molecular dynamicsThermalisationlaw0103 physical sciencesAtomic physics010306 general physicsUltrashort pulsemolecular alignmentdescription
International audience; The rotation-translation thermalization of CO2 gas is investigated 500 ps after its preheating by a nonresonant short and intense laser pulse. The temperature of thermalization is optically determined with two additional short laser pulses enabling a field-free molecular alignment process and its probing, respectively. The measurements are performed for various intensities of the preheat pulse, leading to the observation of different temperatures which are in very good agreement with classical molecular dynamics simulations. The results can be regarded as a step towards real-time tracking of ultrafast relaxation pathways in molecular motion.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-09-19 |