Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 40: Strong laser fields - III
A 40.2: Hauptvortrag
Donnerstag, 8. März 2018, 14:30–15:00, K 2.019
Magnetic Quantum Number in Strong Field Ionizaton — •Sebastian Eckart1, Maksim Kunitski1, Martin Richter1, Alexander Hartung1, Jonas Rist1, Florian Trinter1, Kilian Fehre1, Nikolai Schlott1, Kevin Henrichs1, Lothar Ph. H. Schmidt1, Till Jahnke1, Markus Schöffler1, Kunlong Liu2, Ingo Barth2, Jivesh Kaushal3, Felipe Morales3, Misha Ivanov3, Olga Smirnova3, and Reinhard Dörner1 — 1Goethe-Universität, Frankfurt am Main, Germany — 2Max Planck Institute of Microstructure Physics, Halle (Saale), Germany — 3Max Born Institute, Berlin, Germany
Our experiment shows that elliptically polarized laser pulses selectively tunnel-ionize electrons with defined sign of the magnetic quantum number (m) leaving behind an ion with defined ring current confirming theoretic predictions. Further we find that the initial momentum distributions upon tunnel-ionization depends on m as well. This leads to a shifted energy dependent yield for ionization from m-prepared states. Finally we show how to demerge angular offsets for different m-states allowing for the preparation and detection of ring currents with sub-cycle temporal precision. The three-dimensional electron momenta have been measured in coincidence with their ionic cores using cold-target recoil-ion momentum spectroscopy (COLTRIMS).