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Attosecond Control in Photoionization of Hydrogen Molecules

Kelkensberg, F.; Siu, W.; Perez-Torres, J. F.; Morales, F.; Gademann, G.; Rouzee, A.; Johnsson, Per LU ; Lucchini, M.; Calegari, F. and Sanz-Vicario, J. L., et al. (2011) In Physical Review Letters 107(4).
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 1s sigma(g) and 2p sigma(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... (More)
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 1s sigma(g) and 2p sigma(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. (Less)
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publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
107
issue
4
publisher
American Physical Society
external identifiers
  • wos:000292872600001
  • scopus:79961043529
ISSN
1079-7114
DOI
10.1103/PhysRevLett.107.043002
language
English
LU publication?
yes
id
ce02e331-4b50-44b2-9b47-d27929a86ce1 (old id 2085006)
date added to LUP
2011-08-25 15:30:41
date last changed
2017-11-19 03:11:53
@article{ce02e331-4b50-44b2-9b47-d27929a86ce1,
  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 1s sigma(g) and 2p sigma(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.},
  articleno    = {043002},
  author       = {Kelkensberg, F. and Siu, W. and Perez-Torres, J. F. and Morales, F. and Gademann, G. and Rouzee, A. and Johnsson, Per and Lucchini, M. and Calegari, F. and Sanz-Vicario, J. L. and Martin, F. and Vrakking, M. J. J.},
  issn         = {1079-7114},
  language     = {eng},
  number       = {4},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Attosecond Control in Photoionization of Hydrogen Molecules},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.107.043002},
  volume       = {107},
  year         = {2011},
}