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A: Fachverband Atomphysik

A 23: Poster – Interaction with Strong or Short Laser Pulses (joint session A/MO)

A 23.2: Poster

Mittwoch, 4. März 2026, 17:00–19:00, Philo 1. OG

Time-delay in Tunnel-Ionization and barrier-suppression ionization — •Ossama Kullie — Theoretical Physics, Institute for Physics, Department of Mathematics and Natural Science, University of Kassel, Germany.

In previous work, we presented tunnel-ionization model [1,2], in which we showed a real tunneling time-delay picture that agrees well with the experimental results in the adiabatic [1] and nonadiabatic [3] field calibrations. In addition, we showed that the tunnel-ionization time exhibits a universal behavior consistent with Winful’s unified tunneling picture [4], which amounts to determine the barrier time-delay with good agreement with the experimental result and it corresponds to the interaction time [5]. Barrier-suppression ionization is a phenomenon in strong-field physics where a high-intensity laser field completely flattens the potential barrier, allowing an electron to escape an atom or molecule without the need for quantum tunneling. In the present work, based on our model [1] and the findings of recent work [5], we extend our time-delay model to include the regime of barrier-suppression ionization. [1] O. Kullie, Phy. Rev. A 92, 052118 (2015). [2] O. Kullie, Annals of Physics 389, 333 (2018). [3] O. Kullie and I. A. Ivanov, Annals of Physics 464, 169648 (2024). [4] H. Winful, Phys. Rev. Lett. 90. 023901 (2003). [5] O. Kullie, J. Phyis. Commun. 9, 015003, (2025).

Keywords: Ultrafast science; tunneling and tunnel ionization time-delay; attosecond physics; Berrier-suppression inonization; interaction time