SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 22: Poster II

Q 22.69: Poster

Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof

Coherent Light-Electron Interaction in an SEM — •Maxim Sirotin, Tomáš Chlouba, Roy Shiloh, and Peter Hommelhoff — Department Physik, Friedrich-Alexander-Universität Erlangen- Nürnberg (FAU), 91058 Erlangen

The coherent interaction of light and free electrons was experimentally demonstrated over a decade ago in a transmission electron microscope (TEM) in the form of photon-induced near-field electron microscopy (PINEM). Until today, it has found many fundamental scientific applications such as attosecond quantum coherent control, free electron quantum state generation and photon statistics reconstruction. So far, all PINEM experiments used ultrafast TEMs rather than scanning electron microscopes (SEM), mainly because the required high-resolution spectrometer is not commercially available. However, SEMs allow access to the yet unexplored subrelativistic energy range from ∼0.5 to 30 keV which provides potentially higher electron-light coupling efficiency. Also, SEMs offer spacious and easily-configurable experimental chambers for extended optical setups, potentially boasting thousands of photon-electron interaction sites. We built a compact magnetic high-resolution electron spectrometer and experimentally demonstrated the quantum coherent coupling between electrons and optical nearfields in an SEM at unprecedentedly low, sub-relativistic energies [1]. This demonstration of PINEM in an SEM opens a new avenue to fundamental research in electron-photon quantum interactions.

[1] R. Shiloh, T. Chlouba, and P. Hommelhoff, Physical Review Letters 128, 235301 (2022)