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TUE: Tuesday Contributed Sessions
TUE 12: Quantum Sensing and Decoherence: Contributed Session to Symposium III
TUE 12.1: Talk
Tuesday, September 9, 2025, 14:15–14:30, ZHG105
Inelastic electron-light interaction probed by holographic scanning transmission electron microscopy — •Nora Bach1,2, Tim Dauwe1,2, Murat Sivis1,2, and Claus Ropers1,2 — 1Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany — 24th Physical Institute, University of Göttingen, Germany
In an ultrafast transmission electron microscope (UTEM), inelastic scattering between free electrons and optical near fields allows for coherent manipulations of the electron quantum state [1]. Recently, different techniques have been developed to reveal the near-field phase imprinted onto the electron wave function, but offer only limited variability in tailoring the electron-light interactions and require a highly coherent electron source [2,3]. In this contribution, we introduce scanning transmission electron microscopy with spatially separated coherent electron probes [4] for the full imaging of complex optical near fields at relaxed coherence requirements. In the far field, these electron probes interfere to form a hologram from which we reconstruct phase shifts induced both by elastic scattering processes and by stimulated inelastic interactions. By superimposing multiple parallel interactions, our approach can be extended to tailoring of the electron spectral distribution beyond what is achievable with a single interaction.
[1] Feist et al., Nature 521, (2015)
[2] Gaida et al., Nature Communications 14, (2023)
[3] Gaida et al., Nature Photonics 18 (2024)
[4] Fehmi et al., Journal of Physics D: Applied Physics 51 (2018)
Keywords: Ultrafast Tranmission Electron Microscopy; phase contrast; holography