article published Karl Jakob Schiller author Lasse Sternemann author Matija Stupar author Alan Omar author Martin Hoffmann author Jonah Elias Nitschke author Valentin Mischke author David Maximilian Janas author Stefano Ponzoni author Giovanni Zamborlini author Clara Jody Saraceno author Mirko Cinchetti author TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen project TRR 142 - Project Area A project TRR 142; TP A08: Nichtlineare Kopplung von Zwischenschicht-Exzitonen in van der Waals-Heterostrukturen an plasmonische und dielektrische Nanokavitäten project <jats:title>Abstract</jats:title> <jats:p>Time-resolved momentum microscopy is an emerging technique based on photoelectron spectroscopy for characterizing ultrafast electron dynamics and the out-of-equilibrium electronic structure of materials in the entire Brillouin zone with high efficiency. In this article, we introduce a setup for time-resolved momentum microscopy based on an energy-filtered momentum microscope coupled to a custom-made high-harmonic generation photon source driven by a multi-100 kHz commercial Yb-ultrafast laser that delivers fs pulses in the extreme ultraviolet range. The laser setup includes a nonlinear pulse compression stage employing spectral broadening in a Herriott-type bulk-based multi-pass cell. This element allows flexible tuning of the driving pulse duration, providing a versatile time-resolved momentum microscopy setup featuring two operational modes designed to enhance either the energy or time resolution. We show the capabilities of the system by tracing ultrafast electron dynamics in the conduction band valleys of a bulk crystal of the 2D semiconductor WS<jats:sub>2</jats:sub>. Using uncompressed driving laser pulses, we demonstrate an energy resolution better than (107 ± 2) meV, while compressed pulses lead to a time resolution better than (48.8 ± 17) fs.</jats:p> Springer Science and Business Media LLC2025 eng 2045-232210.1038/s41598-025-86660-1 151 Schiller, K. J., Sternemann, L., Stupar, M., Omar, A., Hoffmann, M., Nitschke, J. E., Mischke, V., Janas, D. M., Ponzoni, S., Zamborlini, G., Saraceno, C. J., &#38; Cinchetti, M. (2025). Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution. <i>Scientific Reports</i>, <i>15</i>(1), Article 3611. <a href="https://doi.org/10.1038/s41598-025-86660-1">https://doi.org/10.1038/s41598-025-86660-1</a> K. J. Schiller <i>et al.</i>, “Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution,” <i>Scientific Reports</i>, vol. 15, no. 1, Art. no. 3611, 2025, doi: <a href="https://doi.org/10.1038/s41598-025-86660-1">10.1038/s41598-025-86660-1</a>. K.J. Schiller, L. Sternemann, M. Stupar, A. Omar, M. Hoffmann, J.E. Nitschke, V. Mischke, D.M. Janas, S. Ponzoni, G. Zamborlini, C.J. Saraceno, M. Cinchetti, Scientific Reports 15 (2025). Schiller, Karl Jakob, Lasse Sternemann, Matija Stupar, Alan Omar, Martin Hoffmann, Jonah Elias Nitschke, Valentin Mischke, et al. “Time-Resolved Momentum Microscopy with Fs-XUV Photons at High Repetition Rates with Flexible Energy and Time Resolution.” <i>Scientific Reports</i> 15, no. 1 (2025). <a href="https://doi.org/10.1038/s41598-025-86660-1">https://doi.org/10.1038/s41598-025-86660-1</a>. Schiller, Karl Jakob, et al. “Time-Resolved Momentum Microscopy with Fs-XUV Photons at High Repetition Rates with Flexible Energy and Time Resolution.” <i>Scientific Reports</i>, vol. 15, no. 1, 3611, Springer Science and Business Media LLC, 2025, doi:<a href="https://doi.org/10.1038/s41598-025-86660-1">10.1038/s41598-025-86660-1</a>. Schiller KJ, Sternemann L, Stupar M, et al. Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution. <i>Scientific Reports</i>. 2025;15(1). doi:<a href="https://doi.org/10.1038/s41598-025-86660-1">10.1038/s41598-025-86660-1</a> @article{Schiller_Sternemann_Stupar_Omar_Hoffmann_Nitschke_Mischke_Janas_Ponzoni_Zamborlini_et al._2025, title={Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution}, volume={15}, DOI={<a href="https://doi.org/10.1038/s41598-025-86660-1">10.1038/s41598-025-86660-1</a>}, number={13611}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Schiller, Karl Jakob and Sternemann, Lasse and Stupar, Matija and Omar, Alan and Hoffmann, Martin and Nitschke, Jonah Elias and Mischke, Valentin and Janas, David Maximilian and Ponzoni, Stefano and Zamborlini, Giovanni and et al.}, year={2025} } 620572025-11-04T07:47:28Z2025-11-04T07:48:50Z