Erlangen 2018 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 15: Complex Systems in the Gas Phase

MO 15.3: Vortrag

Mittwoch, 7. März 2018, 14:30–14:45, PA 1.150

Excitation and ionization of atoms and molecules by vortex fields — •Carlos Mario Granados-Castro and Jamal Berakdar — Institut für Physik, Martin-Luther Universität Halle-Wittenberg, 06114 Halle (Saale)

The excitations of atoms and molecules with photons and charged particles is fairly well understood. The use of spatially structured beams such as vortex beams (VBs) of electrons or photons brings in new aspects related to the topology of VB, allowing to transfer a controllable amount of orbital angular momentum (OAM) to the sample. Ion trapping and optical tweezers are some of the applications of VBs. Also, it has been demonstrated that the access to the magnetic sublevels of atomic systems and the control of charge in spin-orbital coupled nanoscopic systems is possible with the use of OVs. Those applications are directly related with the emergence of new optical selection rules.

In this contribution we inspect the low energy electron emission and the excitations of atoms and molecules in vortex fields and present and analyze the modifications brought about by the topology of the exciting fields.