Erlangen 2018 – scientific programme
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A: Fachverband Atomphysik
A 23: Strong laser fields - I (joint session A/MO)
A 23.2: Talk
Tuesday, March 6, 2018, 14:30–14:45, K 2.019
Non-linear dichroism in atomic ionization — •Jiri Hofbrucker1,2, Andrey V. Volotka1, and Stephan Fritzsche1,2 — 1Helmholtz Institute, Jena, Germany — 2Friedrich-Schiller University Jena
Dichroic behavior is usually associated with an interaction of polarized atomic or chiral molecular target and circularly polarized light. However, in a non-linear interaction regime, elliptically polarized light ionizing symmetric target also produces a dichroic photoelectron angular distributions. The fundamental origin of this asymmetry explains why is the elliptical dichroism strictly a feature of multi-photon processes only, and why it is never observed in the single photon ionization process. Being energy and system specific, this phenomena give us an opportunity to study many-electron effects as well as fundamentals of non-linear light-matter interaction. Observation of this phenomena in two-photon ionization of an inner-shell shell electron of a rare gas atom is proposed.