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Q: Fachverband Quantenoptik und Photonik

Q 23: Poster I

Q 23.51: Poster

Dienstag, 12. März 2024, 17:00–19:00, Tent B

Generating auto-ponderomotive potentials using flat, chip-based electrodes for shaping electron beams — •Franz Schmidt-Kaler, Michael Seidling, Robert Zimmermann, Nils Bode, Fabian Bammes, Lars Radtke, and Peter Hommelhoff — Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen

Manipulating free electron beams has been realized with complex electrostatic fields generated with planar electrodes. Within the frame of the moving electron, these static fields transform into an alternating auto-ponderomotive potential, resembling the one of a microwave-driven Paul trap confining the electrons. Prior, we showed that we can split and guide electron beams along curved paths this way, with electron energies ranging from a few electron volts to 1.7 keV (for splitting) and 9.5 keV (for guiding). Here we focus on electron beam resonators. We have demonstrated the first linear version to work for 50 eV electrons and measured its coupling efficiency. All configurations can be integrated into standard SEM*s, offering entirely new options for future coherent electron control. Interaction-free measurement schemes based on repeated electron sample interaction could benefit greatly.

Keywords: free electron beams; auto-ponderomotive potential; paul trap; electron microscopy; quantum electron microscope