Evolution of angular distributions in two-colour, few-photon ionization of helium

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Single ionization of helium by a superposition of selected XUV high harmonics and infrared radiation has been studied by a momentum imaging technique. The measured angular distributions of photoelectrons are compared to numerical time-dependent calculations, showing very good agreement after average. The calculated angular distributions appear to depend critically on the delay between harmonic and infrared pulses on the attosecond scale, and on the relative phases and intensities of the harmonics.


  • O. Guyétand
  • M. Gisselbrecht
  • A. Huetz
  • P. Agostini
  • R. Taïeb
  • A. Maquet
  • B. Carré
  • P. Breger
  • O. Gobert
  • D. Garzella
  • J. F. Hergott
  • O. Tcherbakoff
  • H. Merdji
  • M. Bougeard
  • H. Rottke
  • M. Böttcher
  • Z. Ansari
  • P. Antoine
Externa organisationer
  • University of Paris-Sud
  • Pierre and Marie Curie University
  • Saclay Nuclear Research Centre
  • Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy
  • Université catholique de Louvain
TidskriftJournal of Physics B: Atomic, Molecular and Optical Physics
Utgåva nummer5
StatusPublished - 2008 mar 14
Peer review utfördJa
Externt publiceradJa