SKM 2023 – wissenschaftliches Programm
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VA: Fachverband Vakuumphysik und Vakuumtechnik
VA 1: Vacuum Technology: New Developments and Applications
VA 1.5: Vortrag
Montag, 27. März 2023, 11:30–12:00, HSZ 301
Inelastic electron scattering at a single-beam structured light wave — •Sven Ebel1 and Nahid Talebi1,2 — 1Institute of Experimental and Applied Physics, Kiel University, 24098 Kiel, Germany — 2Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, 24118 Kiel, Germany
In this work we demonstrate the inelastic scattering of slow-electron wave packets at a propagating Hermite-Gaussian light beam. The pulsed Hermite-Gaussian beam thereby forms a pondermotive potential for the electron with large enough momentum components, leading to the inelastic scattering of electrons and their bunching along the longitudinal direction. We show that the resulting energy-gain spectra after the interaction is strongly influenced by the self-interference of the electron in this pondermotive potential. It is shown that this effect is observable for various optical wavelengths and intensities and further discuss how the variation of the electron velocity and the light intensity allow to control the energy modulation of the electron wave packet. This effect opens up a new platform for manipulating the electron wave packet by utilizing the vast landscape of structured electromagnetic fields.