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TT: Fachverband Tiefe Temperaturen

TT 37: Ultrafast electron dynamics at surface and interfaces – Poster (joint session O/TT)

TT 37.17: Poster

Dienstag, 10. März 2026, 14:00–16:00, P2

Implementation of white light continuum probing for pump-probe spectroscopy — •Joris Wicker, Tim Titze, Maximilian Staabs, Jacob Kutzner, Stefan Mathias, and Daniel Steil — University of Göttingen, 1. Institute of Physics, Göttingen, Germany

We integrated a white-light continuum (WLC) probe together with a prism spectrometer in a conventional two-color femtosecond pump-probe setup. Further, we developed a custom measurement program using Microsoft’s .NET Framework and Python, enabling instrument control, automated measurement sequences, and preliminary data analysis. To test the modified setup and software, we investigated the transient evolution of the reflectivity in metallic thin film systems and perovskite oxides using 1030 nm pumping. Spectrally and temporally resolved reflectivity variations were observed, confirming the proper functionality of the system. Furthermore, the stability of the WLC source was characterized. Possible future improvements include integrating a Wollaston prism to enable spectrally and time-resolved magneto-optical Kerr effect (MOKE) measurements.

Keywords: white light continuum; pump-probe spectroscopy