Bulletin of the American Physical Society
53rd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 67, Number 7
Monday–Friday, May 30–June 3 2022; Orlando, Florida
Session N01: Poster Session II (4:00-6:00pm, EDT)
4:00 PM,
Wednesday, June 1, 2022
Room: Grand Ballroom C
Abstract: N01.00144 : Dynamic interference in the 2+1 photon resonance-enhanced multiphoton ionization of Li*
Presenter:
Attila Tóth
(ELI-ALPS)
Authors:
Attila Tóth
(ELI-ALPS)
András Csehi
(University of Debrecen)
area. Under the influence of a strong resonant laser field the electronic states are subject
to a time-dependent coupling and repel each other. If the pulse supports many optical cycles,
this ac Stark shift of the energy levels follows the pulse envelope. Accordingly, electrons
emitted in the rising and falling edge of the pulse will have the same energy, but their
time delay will give rise to an interference pattern in the spectra. In our earlier work [1]
we investigated the two-photon Rabi oscillations induced between the 2s and 4s states of
the Li atom and probed the dynamics with the photoelectron spectra obtained by the
absorption of a third photon from the same pulse. Employing a three-state model we
highlighted the connection between the dynamic interference structures of the spectra
and the Stark shifts and two-photon Rabi frequency. The present work is our attempt to
validate the predictions of the three-state model with ab-initio calculations in the
single-active-electron picture [2].
[1] A. Tóth, A. Csehi, J. Phys. B 54 (2021) 035005
[2] A. Tóth, A. Csehi, Phys. Rev. A 104 (2021) 063102
*This research was supported by the EU-funded Hungarian Grant No. EFOP-3.6.2-16-2017-00005, and the ELI-ALPS Project GINOP 2.3.6-15-2015-00001.
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