Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 19: Collisions, scattering and correlation phenomena
A 19.3: Poster
Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof
Manipulating electron vortex beams with crossing laser beams — •Armen Hayrapetyan1, Marco Ornigotti2, Karen Grigoryan3, Alexander Szameit2, and Jörg Götte4 — 1Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany — 2Institute of Applied Physics, Friedrich-Schiller Universität Jena, Germany — 3Yerevan State University, Armenia — 4School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, U.K.
Recent advances in technology have made it possible to generate electron vortex beams with subnanometer spot size and quantized orbital angular momentum along their axes of propagation. In this present work, we explore the interaction of such electron vortices with plane wave laser fields propagating perpendicularly to each other. In such a crossed-beam scenario, we develop a relativistic scalar theory for laser-driven electron vortices and find Bessel-type solutions to the Klein-Gordon equation. By constructing distributions of the probability density and the transverse current, we examine two distinct cases when the electron is incident on either of the maximum or minimum of the laser field. On each of these cases we derive different coupling constants and demonstrate the possibility of controlling and manipulating the electron vortices via lasers.