Aarhus University Seal

Electron correlation dynamics in atomic Kr excited by XUV pulses and controlled by NIR laser pulses of variable intensity

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review


  • Andreas Hult Roos, The Extreme Light Infrastructure ERIC
  • ,
  • Ziaul Hoque, The Extreme Light Infrastructure ERIC
  • ,
  • Eva Klimešová, The Extreme Light Infrastructure ERIC
  • ,
  • Ltaief Ben Ltaief
  • Cristian Medina, University of Freiburg
  • ,
  • Matej Jurkovič, The Extreme Light Infrastructure ERIC
  • ,
  • Martin Albrecht, The Extreme Light Infrastructure ERIC
  • ,
  • Ondřej Finke, The Extreme Light Infrastructure ERIC
  • ,
  • Ondřej Hort, The Extreme Light Infrastructure ERIC
  • ,
  • Jaroslav Nejdl, The Extreme Light Infrastructure ERIC
  • ,
  • Marcel Mudrich
  • Jakob Andreasson, The Extreme Light Infrastructure ERIC
  • ,
  • Maria Krikunova, Technical University of Applied Sciences Wildau

We have investigated the possibility to track and control correlation dynamics of valence electrons in krypton (Kr) initiated by the absorption of one extreme ultraviolet (XUV) photon. In this investigation, pump-probe experiments have been performed where monochromatized single high-harmonics at photon energies 29.6, 32.8, and 35.9 eV have been used as pump to populate different intermediate excited states. A temporally delayed near-infrared (NIR) pulse probes the population of various decay channels via the detection of Kr 2+ ion yields and its transient profiles. We observe that by varying the NIR pulse intensity within a range from 0.3 × 10 13 to 2.6 × 10 13 W cm −2, the shape of the Kr 2+ transient profile changes significantly. We show that by varying the intensity of the NIR pulse, it is possible—(i) to control the ratio between sequential and non-sequential double ionization of Kr; (ii) to selectively probe quantum beating oscillations between Kr + ∗ satellite states that are coherently excited within the bandwidth of the XUV pulse; and (iii) to specifically probe the relaxation dynamics of doubly excited (Kr ∗ ∗ ) decay channels. Our studies show that the contribution of different ionization and decay channels (i)-(iii) can be altered by the NIR pulse intensity, thus demonstrating an efficient way to control the ionization dynamics in rare gas atoms.

Original languageEnglish
Article number013038
JournalNew Journal of Physics
Number of pages11
Publication statusPublished - Jan 2023

    Research areas

  • HHG, XUV/NIR pump-probe, control ionization dynamics, doubly excited states, electron correlation, krypton satellite states, quantum beating oscillation

See relations at Aarhus University Citationformats

ID: 305445202