Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 26: Focus Session Ultrafast Electron Microscopy at the Space-Time Limit III
O 26.5: Vortrag
Dienstag, 18. März 2025, 11:45–12:00, H2
Recent results of the ultrafast scanning electron microscope in Erlangen — •Stefanie Kraus1, Tomas Chlouba1, Roy Shiloh1, Leon Brückner1, Julian Litzel1, Zhexin Zhao1, Viacheslav Korolev1, Manuel Konrad1, Tatsunori Shibuya1,3, and Peter Hommelhoff1,2 — 1Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen — 2Department Physik, Ludwig-Maximilians-Universität München (LMU), 80799 München — 3AIST, Tsukuba, Japan
Ultrafast electron microscopy is revolutionizing the capabilities of electron microscopes, allowing for unprecedented spatial and temporal resolution. Closely related is the coupling of electrons and optical nearfields, which is based on the excellent electron pulse properties an ultrafast scanning electron microscope (USEM) can provide. We have leveraged the interaction of electrons with the near field of a periodic structure to achieve sub-femtosecond electron pulse compression as well as laser acceleration of electrons. This advancement enhances temporal resolution and facilitates large beam energy variations, enabling detailed investigations of ultrafast dynamics. In this talk, we will provide an overview of our recent progress, including electron energy modulation in larger structures illuminated with 10 micrometer light as to enhance the current throughput, electron bunch compression, and the latest experimental results.
Keywords: USEM; Ultrafast scanning electron microscope; Electron bunching; Particle acceleration; Nanophotonics