Regensburg 2025 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 26: Focus Session Ultrafast Electron Microscopy at the Space-Time Limit III

Dienstag, 18. März 2025, 10:30–13:00, H2

Shaping functionalities on the nanoscale is one of the most essential challenges in modern condensed matter research. It requires a comprehensive understanding of the complex interplay of the electronic, spin, and lattice degrees of freedom in materials and requires tailoring energy transfer and dissipation pathways on the smallest length and fastest timescales. Recent instrumentation breakthroughs in different varieties of pump-probe ultrafast electron microscopy have opened the way for accessing electronic and structural dynamics at surfaces, interfaces, and nanostructures with down-to-attosecond resolution in time. While ultrafast photoemission electron microscopy techniques provide supreme sensitivity to spin and electron dynamics in real momentum space, bright ultrashort electron pulses in the ultrafast implementation of more traditional electron microscopes can probe optical states, local magnetization, and lattice dynamics with a nanometer spatial resolution.

This focus session highlights recent advances in ultrafast high-resolution electron probing. These include new instrumentation and techniques, excitations from the THz to X-ray regime, and studying novel phenomena and materials systems. At the same time, it will bring together researchers from the different areas of ultrafast condensed matter physics to foster discussions and new collaborations to explore emergent scientific questions in this field.

Organized by
Armin Feist (MPI Göttingen) and Benjamin Stadtmüller (University Augsburg).

	10:30	O 26.1	Hauptvortrag: Attosecond Electron Microscopy — •Peter Baum
	11:00	O 26.2	Steady-State and Time-Resolved Cathodoluminescence of III-Nitride Semiconductors — •Kagiso Loeto, Aidan Flynn Campbell, Domenik Spallelk, and Jonas Lähnemann
	11:15	O 26.3	Spin Resonance Spectroscopy meets Transmission Electron Microscopy — •Philipp Haslinger
	11:30	O 26.4	Observation of Kapitza-Dirac effect with fast electrons — •Kamila Moriová, Petr Koutenský, Marius Constantin Chirita Mihaila, Zbyněk Šobáň, Andreas Schertel, Jaromír Kopeček, and Martin Kozák
	11:45	O 26.5	Recent results of the ultrafast scanning electron microscope in Erlangen — •Stefanie Kraus, Tomas Chlouba, Roy Shiloh, Leon Brückner, Julian Litzel, Zhexin Zhao, Viacheslav Korolev, Manuel Konrad, Tatsunori Shibuya, and Peter Hommelhoff
	12:00	O 26.6	FEL-based core-cum-conduction momentum microscopy of ultrafast charge-density-wave dynamics — •N. Wind, M. Heber, D. Kutnyakhov, L. Wenthaus, J. Dilling, L. Bruckmeier, S. Chernov, O. Tkach, A. Mehta, J. Koralek, G. Dakovski, J.A. Sobota, P.E. Majchrzak, D. Puntel, D. Liu, G. Schönhense, H.J. Elmers, Z.X. Shen, M. Scholz, and K. Rossnagel
	12:15	O 26.7	Developing a versatile fiber-based cathodoluminescence detection system for an ultrafast scanning electron microscope — •Paul H. Bittorf, Filip Majstorovic, and Nahid Talebi
	12:30	O 26.8	Ultrafast Electron Diffraction and Microscopy of Structural Phase Transitions at Megahertz Rates — •Till Domröse and Claus Ropers
	12:45	O 26.9	From Electron-Photon Ghost Imaging Towards Entanglement Certification — •Alexander Preimesberger, Sergei Bogdanov, Phila Rembold, Santiago Beltrán-Romero, Dominik Hornof, Isobel C Bicket, Nicolai Friis, Elizabeth Agudelo, Dennis Rätzel, and Philipp Haslinger