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 S08: Dynamics at the Attosecond Timescale
10:30 AM–12:30 PM,
Thursday, June 2, 2022
Room: Salon 7/8
Chair: Michael Chini, Central Florida
Abstract: S08.00009 : Improved initial conditions of the electron ionized by a strong, linearly polarized laser field and their reconstruction from the detected momentum of the electron
12:06 PM–12:18 PM
(University of Szeged)
(Wigner RCP, ELI-ALPS)
(University of Szeged, ELI-ALPS)
We focus on atomic hydrogen driven by a linearly polarized few-cycle near-infrared laser pulse having a peak intensity that ensures tunneling. We show the real classical picture associated with the exact quantum process of strong-field ionization in the parameter range relevant to state-of-the-art experimental techniques [Sz. Hack et al. Phys. Rev. A, 104, L031102 (2021)]. This classical model follows the quantum evolution very well; it accounts for direct ionization, rescattering and the blurred nature of the liberation process; it solves and explains the problem of the non-zero initial momentum in models assuming traditional tunneling.
Using the improved initial conditions, we show a simple procedure to reconstruct the starting time from the detected momentum of a directly escaping electron. We tested this method with numerical experiments resulting the accuracy of the reconstructed starting time less than 5 as for the most probable trajectories.
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