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

  • 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 Kr²⁺ ion yields and its transient profiles. We observe that by varying the NIR pulse intensity within a range from 0.3 x 10¹³ to 2.6 x 10¹³ W cm⁻², the shape of the Kr²+ 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.

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Author:Andreas Hult RoosORCiD, Ziaul HoqueORCiD, Eva KlimešováORCiD, Ltaief Ben LtaiefORCiD, Cristian MedinaORCiD, Matej JurkovičORCiD, Martin AlbrechtORCiD, Ondřej FinkeORCiD, Ondřej HortORCiD, Jaroslav NejdlORCiD, Marcel MudrichORCiD, Jakob AndreassonORCiD, Maria KrikunovaORCiD
URN:urn:nbn:de:kobv:526-opus4-16987
DOI (Version of Record):https://doi.org/10.1088/1367-2630/acb567
Parent Title (English):New Journal of Physics
Publisher:Institute of Physics Publishing (IOP)
Document Type:Article
Language:English
Year of Publication:2023
Publishing Institution:Technische Hochschule Wildau
Release Date:2023/02/03
Tag:HHG; XUV/NIR pump-probe; control ionization dynamics; doubly excited states; electron correlation; krypton satellite states; quantum beating oscillation
Volume:25
Article Number:013038
Source:Roos, A. H., Hoque, Z., Klimešová, E., Ben Ltaief, L., Medina, C., Jurkovič, M., … Krikunova, M. (2023). Electron correlation dynamics in atomic Kr excited by XUV pulses and controlled by NIR laser pulses of variable intensity. New Journal of Physics, 25, 013038. doi:10.1088/1367-2630/acb567
Faculties an central facilities:Fachbereich Ingenieur- und Naturwissenschaften
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 621 Angewandte Physik
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International
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