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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).