SAMOP 2023 – scientific programme
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A: Fachverband Atomphysik
A 12: Poster I
A 12.1: Poster
Tuesday, March 7, 2023, 16:30–19:00, Empore Lichthof
Femtosecond-modulated attoscond dynamics in atomic resonant ionization — •Hao Liang1, Meng Han2, and Jan Micheal Rost1 — 1Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany — 2Laboratorium für Physikalische Chemie, ETH Zürich, Zürich, Switzerland
Reconstruction of attosecond harmonic beating by interference of two-photon transition (RABBITT) techniques were recently used to measure the resonance transition among bound states of atomic and molecular systems. In those studies, changing the relative delay between infrared pulse and attosecond pulse train is solely regarded as the carrier envelope phase scanning. However, in the case that the relative delay is comparable to the pulse duration, the resonance ionization dynamics itself also dramatically alters, including both the ionization time and phase. In this work, by performing experimental measurement and time-dependent Schrödinger equation simulation, we investigate 1s2-1s3p transition of Helium atom, and reveal the importance of ac-stark shift and population accumulation during resonant process.