Attosecond control in photoionization of hydrogen molecules |
| |
Authors: | Kelkensberg F Siu W Pérez-Torres J F Morales F Gademann G Rouzée A Johnsson P Lucchini M Calegari F Sanz-Vicario J L Martín F Vrakking M J J |
| |
Affiliation: | FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands. |
| |
Abstract: | We report experiments where hydrogen molecules were dissociatively ionized by an attosecond pulse train in the presence of a near-infrared field. Fragment ion yields from distinguishable ionization channels oscillate with a period that is half the optical cycle of the IR field. For molecules aligned parallel to the laser polarization axis, the oscillations are reproduced in two-electron quantum simulations, and can be explained in terms of an interference between ionization pathways that involve different harmonic orders and a laser-induced coupling between the 1sσ(g) and 2pσ(u) states of the molecular ion. This leads to a situation where the ionization probability is sensitive to the instantaneous polarization of the molecule by the IR electric field and demonstrates that we have probed the IR-induced electron dynamics with attosecond pulses. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|