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Fakultät Physik

News

Our latest publication in Scientific Reports

We are excited to announce our latest publication in Scientific Reports, titled 'Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution.'
Schematic view of our time-resolved ARPES setup. © Karl Schiller
Schematic view of the time-resolved ARPES setup. A 50 W Yb-ultrafast laser (Carbide, Light Conversion) with optional compression is split into a pump line to excite non-equilibrium states and a probe line to generate high harmonics. The high harmonics are monochromized via grazing incidence plates and multilayer optics before impinging on the sample surface. Photoemitted electrons are measured using a KREIOS MM equipped with a hemispherical analyzer for kinetic energy discrimination. The MM allows imaging of the electron distribution in both real and momentum space.

In this paper, we introduce a novel setup for time-resolved momentum microscopy that utilizes an energy-filtered momentum microscope coupled with a custom high-harmonic generation photon source. This innovative technique allows us to investigate ultrafast electron dynamics across the entire Brillouin zone with remarkable efficiency. https://doi.org/10.1038/s41598-025-86660-1