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Research Group - Femtosecond Extreme Ultraviolet Spectromicroscopy

PI (Research Group Leader): Dr. Matthijs Jansen

Femtosecond extreme ultraviolet (EUV) light generated through high-harmonic generation (HHG) is the workhorse in a wide collection of spectroscopic and microscopic techniques and has helped to identify several ultrafast dynamics in condensed matter such as ultrafast demagnetization and optically-driven metal-to-insulator transitions. Due to its excellent coherence properties, HHG radiation furthermore presents a unique potential to develop a fully time-, space- and spectrum-resolved spectromicroscopy technique, thereby allowing to trace the diffusion of optical excitations through a nanostructured object. However, this implementation of such a technique has so far remained elusive, in part because of the need to record the EUV light in a spatially and spectrally resolved manner that furthermore allows for accurate numerical image reconstruction.
In this project, we will concentrate on the development of combined experimental and mathematical methods for extreme ultraviolet spectromicroscopy. Here, the close connection between mathematics and experiment will allow us to efficiently measure only the necessary information, thereby allowing a valuable insight into complex dynamics using a table-top HHG setup.

PhD student:
Hannah Strauch