Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 40: Ultrafast electron dynamics at surface and interfaces – Poster (joint session O/TT)
O 40.19: Poster
Dienstag, 10. März 2026, 14:00–16:00, P2
Table-top 3D ultrafast momentum microscopy with a time-preserving EUV-monochromator — •Lennart Weinhagen1, Wiebke Bennecke1, Jan Philipp Bange1, David Schmitt1, Marco Merboldt1, Bent van Wingerden1, Thi Lan Dinh2, Fabio Frasetto3, Luca Poletto3, Marcel Reutzel1, Daniel Steil1, D. Russel Luke2, Stefan Mathias1, and G.S. Matthijs Jansen1 — 11st Institute of Physics, University of Göttingen, Göttingen, Germany — 2Institute for Numerical and Applied Mathematics, University of Göttingen, Göttingen, Germany — 3Institute for Photonics and Nanotechnologies CNR-IFN, Padova, Italy
Photoemission momentum microscopy with tunable probe-photon energy gives unique access to electronic and molecular structures, enabling Fermi-surface imaging, photoemission electron diffraction (PED) and 3D orbital tomography (3D-POT). However, such measurements have largely relied on synchrotron radiation, thus limiting their use in femtosecond-resolved experiments. Here, we present a table-top EUV source with a time-preserving monochromator driven by a 1030 nm femtosecond laser, using an off-plane grating at grazing incidence to reduce spatial chirp. Integrated into our time-resolved momentum microscope [1], it delivers femtosecond, photon-energy-tunable EUV probe pulses. Demonstrated on PTCDA/Ag(110), the setup enabled full 3D reconstruction of the frontier orbitals highlighting the potential of laboratory-scale, energy-selective momentum microscopy [2].
[1] Schmitt et al., Nature 608, 499-503 (2022).
[2] Bennecke et al., arXiv:2502.18269 (2025).
Keywords: 3D Photoemission Orbital Tomography; time preserving EUV-monochromator; Ultrafast Momentum Microscopy