Erlangen 2018 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 1: Attosecond Science I (joint session A/MO)

MO 1.6: Vortrag

Montag, 5. März 2018, 12:15–12:30, K 1.011

Observation of coherent spin-orbit wave packet dynamics in strong-field generated xenon ions — •Maximilian Hartmann, Alexander Blättermann, Paul Birk, Veit Stooß, Gergana Borisova, Christian Ott, and Thomas Pfeifer — Max-Planck-Institut für Kernphysik, Heidelberg, Deutschland

Removing the p-shell valence electron of noble gas atoms generates ions, whose ground state forms a doublet due to spin-orbit interaction. As shown theoretically for neon and xenon [1] and experimentally for krypton [2], both ionic state configurations can be populated in a partially coherent way by means of strong-field ionization, which will give rise to coherent dynamics of the thus created wave packet. For the case of xenon, the fine structure splitting reaches 1.3 eV, which leads to dynamics on a time scale of 3 fs.

Here, we present the observation of coherent wave-packet dynamics in field-ionized xenon generated by intense sub-2 cycle laser pulses and probed by means of attosecond transient absorption spectroscopy. Our results constitute a promising step towards understanding the coherent response of multi-electron systems exposed to strong laser fields -- especially in the regime of sub-cycle field-induced ionization.

[1] Phys. Rev. A 79, 053402 (2009)

[2] Nature 466, 739 (2010)