Mainz 2026 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 32: Interaction with VUV and X-ray Light I (joint session A/MO)
A 32.5: Vortrag
Donnerstag, 5. März 2026, 15:45–16:00, N 2
Laser-driven electron dynamics in helium nanodroplets retrieved from single-shot diffraction patterns — •B. Senfftleben1,2,3, A. Colombo1, A. Hoffmann2, M. Sauppe1,2, K. Kolatzki1,2, B. Langbehn4, J. Schäfer-Zimmermann1,2, M. Kretschmar2, M. Krause2, T. Nagy2, M. J. J. Vrakking2, B. Schütte2, and D. Rupp1,2 — 1ETH Zurich, Switzerland — 2Max-Born-Institut Berlin, Germany — 3European XFEL, Schenefeld, Germany — 4TU Berlin, Germany
Coherent diffraction experiments on single particles using intense X-ray or XUV light sources have revolutionized the structural determination of fragile, short-lived nanoscale samples and their dynamics. However, electronic properties are also inherently encoded in the diffraction patterns, but their extraction requires new analysis methods. In our study, we employed a high-harmonic-generation (HHG) light source to perform NIR-XUV pump-probe experiments at photon energies near strong electronic resonances of helium droplets.
In this presentation, several of our analysis approaches to address challenges related to detection artifacts and the multicolor nature of HHG radiation will be discussed. Moreover, initial findings on ultrafast changes in the optical properties and, thus, on electron dynamics of helium nanodroplets will be presented.
Keywords: helium; nanodroplets; HHG; XUV; diffraction