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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

Sub-cycle ionization dynamics revealed by trajectory resolved, elliptically-driven high-order harmonic generation

Author

  • Esben Witting Larsen
  • Stefanos Carlström
  • Eleonora Lorek
  • Christoph Michael Heyl
  • David Palecek
  • Kenneth Joseph Schafer
  • Anne L'Huillier
  • Donatas Zigmantas
  • Johan Mauritsson

Summary, in English

The sub-cycle dynamics of electrons driven by strong laser fields is central to the emerging field of attosecond science. We demonstrate how the dynamics can be probed through high-order harmonic generation, where different trajectories leading to the same harmonic order are initiated at different times, thereby probing different field strengths. We find large differences between the trajectories with respect to both their sensitivity to driving field ellipticity and resonant enhancement. To accurately describe the ellipticity dependence of the long trajectory harmonics we must include a sub-cycle change of the initial velocity distribution of the electron and its excursion time. The resonant enhancement is observed only for the long trajectory contribution of a particular harmonic when a window resonance in argon, which is off-resonant in the field-free case, is shifted into resonance due to a large dynamic Stark shift.

Department/s

  • Atomic Physics
  • Chemical Physics

Publishing year

2016-12-19

Language

English

Publication/Series

Scientific Reports

Volume

6

Document type

Journal article

Publisher

Nature Publishing Group

Topic

  • Physical Chemistry

Status

Published

ISBN/ISSN/Other

  • ISSN: 2045-2322