Bonn 2025 – wissenschaftliches Programm
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SYAO: Symposium New Avenues in Molecular Alignment and Orientation
SYAO 1: New Avenues in Molecular Alignment and Orientation
SYAO 1.3: Hauptvortrag
Freitag, 14. März 2025, 15:30–16:00, HS 1+2
Strong-Field Ionization and Electron Rescattering Probabilities in the Molecular Frame — •Jochen Mikosch1, Martin Garro1, Narayan Kundu1, Horst Rottke1, Killian Dickson2, Varun Makhija2, Federico Branchi3, Felix Schell3, Mark Mero3, C P Schulz3, Serguei Patchkovskii3, and Marc Vrakking3 — 1Universität Kassel — 2Univ. of Mary Washington, Fredericksburg, USA — 3Max-Born-Institut, Berlin
Alignment of molecules can be used to obtain molecular-frame information from a laboratory-frame measurement. We present two different strategies to obtain the strong-field ionization and the elastic electron-recollision probabilities in the frame of an asymmetric top molecule exposed to an infrared light field with linear polarization. Polar angle-resolved, azimuthal angle-averaged information is achieved from a measurement on one-dimensionally laser-aligned molecules. Both polar and azimuthal angle-resolved molecular-frame information is retrieved by analyzing lab-frame coherent rotational wavepacket evolution following a non-adiabatic alignment laser pulse.
By virtue of ion-electron coincidence detection in a reaction microscope, we separate the ground-state (D0) and first excited state (D1) ionization channel. In this way two scattering experiments on the same target are performed simultaneously with two different continuum electron wavepackets. We find that the nodal structure of the ionizing orbitals is more strongly reflected in the electron rescattering rather than the ionization probability. Experimental results are compared with results from a TD-RIS ab-initio simulation.