867. Wilhelm and Else Heraeus Seminar on "Quantum Electron-Photon Interactions"

Ultrafast Electron Microscopy with Single and Multiple Electrons

Not scheduled

20m

Charles University (Prague)

Invited talk

Speaker

Peter Baum (Universität Konstanz, Fachbereich Physik)

Description

All processes in materials, nanostructures and devices are on a fundamental level defined by electronic and atomic motion from initial to final conformations. Our approach for a direct, real-space visualization is pump-probe electron microscopy and diffraction with single-electron wavepackets [1] under the control of laser light [2]. The resulting few-femtosecond and attosecond time resolution allows to see almost any light-matter interaction or structural dynamics on fundamental scales in space and time [3-8]. Additional phenomena arise when more than one electron is applied [9]. We report recent technology developments [3-4] and how they provide insight into phase transitions [4], terahertz electronics [5-6], chiral phonons [7], optical nanomaterials [8] and free-electron quantum phenomena [9], concluding with a perspective on what is yet to come.
[1] P. Baum, Chem. Phys. 423, 55-61 (2013).
[2] C. Kealhofer, W. Schneider, D. Ehberger, A. Ryabov, F. Krausz, P. Baum, Science 352, 429 (2016).
[3] Y. Fang, J. Kuttruff, D. Nabben, P. Baum, Science 385, 183-187 (2024).
[4] D. Kazenwadel, J. Holder, L. Ciorciaro, N. Neathery, R. Schwenzer, L. Oleschko, J. Hertkorn, M. Sandor, P. Baum, arXiv:2604.03148 (2026).
[5] A. Ryabov and P. Baum, Science 353, 374 (2016).
[6] M. Mattes, M. Volkov, P. Baum, Nature Comm. 15, 1743 (2024).
[7] S. R. Tauchert, M. Volkov, D. Ehberger, D. Kazenwadel, M. Evers, H. Lange, A. Donges, A. Book, W. Kreuzpaintner, U. Nowak, P. Baum, Nature 602, 73 (2022).
[8] D. Nabben, J. Kuttruff, L. Stolz, A. Ryabov, P. Baum, Nature 619, 63 (2023).
[9] O. Tziperman, D. Nabben, R. Ruimy, J. Holder, E. Nussinson, Y. Fang, A. Gorlach, D. Kazenwadel, A. Karnieli, I. Kaminer, P. Baum, Nature Physics 22, 763-769 (2026).