Probing ultrafast dynamics of chiral molecules using time-resolved photoelectron circular dichroism - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Faraday Discussions Année : 2016

Probing ultrafast dynamics of chiral molecules using time-resolved photoelectron circular dichroism

Gustavo Garcia
Laurent Nahon

Résumé

Measuring the ultrafast dynamics of chiralmolecules in the gas phase has been a long standing and challenging quest of molecular physics. The main limitation to reach that goal has been the lack of highly sensitive chiroptical measurement. By enabling chiral discrimination with up to several 10% of sensitivity, photoelectron circular dichroism (PECD) offers a solution to this issue. However, tracking ultrafast processes requires measuring PECD with ultrashort light pulses. Here we compare the PECD obtained with different light sources, from the extreme ultraviolet to the mid-infrared range, leading to different ionization regimes: single-photon, resonance-enhanced multiphoton, above-threshold and tunnel ionization. We use single and multiphoton ionization to probe the ultrafast relaxation of fenchone molecules photoexcited in their first Rydberg states. We show that time-resolved PECD enables revealing dynamics much faster than the population decay of the Rydberg states, demonstrating the high sensitivity of this technique to vibronic relaxation.
Fichier non déposé

Dates et versions

hal-01582329 , version 1 (05-09-2017)

Identifiants

Citer

Samuel Beaulieu, Antoine Comby, Baptiste Fabre, Dominique Descamps, Amélie Ferré, et al.. Probing ultrafast dynamics of chiral molecules using time-resolved photoelectron circular dichroism. Faraday Discussions, 2016, 194, pp.325-348. ⟨10.1039/c6fd00113k⟩. ⟨hal-01582329⟩
132 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More