Multicolour above-threshold ionization of helium: Quantum interference effects in angular distributions

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Energy- and angle-resolved photoionization spectra of He irradiated by linearly polarized intense 810 nm laser radiation and several of its XUV odd harmonics are investigated. The angular distribution of the odd-order peaks, produced by single-photon ionization by one harmonic, is, surprisingly, broadened by the IR field. The even-order ones, due to two-colour, two-photon ionization, show at 90° lobes which depend on the relative IR-XUV phase. Application to the characterization of attosecond pulses is suggested.


  • O. Guyétand
  • M. Gisselbrecht
  • A. Huetz
  • P. Agostini
  • R. Taïeb
  • V. Véniard
  • A. Maquet
  • L. Antonucci
  • O. Boyko
  • C. Valentin
  • D. Douillet
Externa organisationer
  • University of Paris-Sud
  • Pierre and Marie Curie University
  • École Polytechnique

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Fysik
TidskriftJournal of Physics B: Atomic, Molecular and Optical Physics
Utgåva nummer22
StatusPublished - 2005 nov 28
Peer review utfördJa
Externt publiceradJa