Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 23: Poster I

Q 23.52: Poster

Tuesday, March 12, 2024, 17:00–19:00, Tent B

Characterization of auto-ponderomotive electron guides — •Nils Bode, Franz Schmidt-Kaler, Fabian Bammes, Lars Radtke, Michael Seidling, Robert Zimmermann, and Peter Hommelhoff — Physik Department, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 1, 91058 Erlangen

Advanced control over electron beams may enable new coherent electron applications such as a quantum electron microscope. With the help of auto-ponderomotive structures, we have recently demonstrated electron guiding with energies ranging from 20eV to 9,5keV. These electron guides utilize patterned electrostatic electrode assemblies, which, seen from the comoving frame of the electron, generate a pseudopotential similar to conventional Paul traps. We investigate the stability regions of these new 2D traps as well as the coupling efficiencies, both numerically and in experiment, for beam energies between 50eV and 500eV. Additionally, the interim deceleration of electrons inside the guiding potential down to energies of about 0.1eV was simulated. Initial preliminary measurements show a successful deceleration of 40% for an 500eV electron beam.

Keywords: QEM; electron microscopy; auto-ponderomotive potential; electron optics; electron wave guides