Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here:

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Anne L'Huillier

Anne l'Huillier


Anne L'Huillier

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


  • 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.


  • Atomic Physics
  • Chemical Physics

Publishing year





Scientific Reports



Document type

Journal article


Nature Publishing Group


  • Physical Chemistry




  • ISSN: 2045-2322