Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 3: Atomic systems in external fields I
A 3.1: Hauptvortrag
Montag, 29. Februar 2016, 11:00–11:30, f303
Interaction of atoms and ions with twisted light — •Stephan Fritzsche1,2, Daniel Seipt1,2, and Andrey Surzhykov1 — 1Helmholtz-Institut Jena, 07743 Jena, Germany — 2Theoretisch-Physikalisches Institut, Universität Jena, 07743 Jena, Germany
Research on optical vortices, popularly known also as twisted light, has attracted much interest during
the past two decades. However, while the spin and orbital angular momentum distributions of such light beams have been explored in good detail, little is known so far about their interaction with (clouds of) atoms and how the angular momentum of the light affects the subsequent fluorescence or photoelectron emission. Here, we summarize recent results on the photoexcitation and photoionization of (multi-electron) atoms as obtained within the framework of the density matrix theory. It is shown that the population of the excited atoms, their photon emission as well as the angular distribution of the photoelectrons become sensitive to the transverse momentum and the (projection of the) total angular momentum of the incident radiation, especially if the atoms are localized with regard to the beam (axis).
[1] M. Scholz-Marggraf et al., Phys. Rev. A90 013425.
A. Surzhykov et al., Phys. Rev. A91 013403.