Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 19: Cluster I (joint session A/MO)
A 19.1: Hauptvortrag
Mittwoch, 13. März 2019, 14:00–14:30, S HS 3 Physik
Imaging ultrafast dynamics in nanoparticles with resonant multicolor XUV pulses — L Hecht2, B Langbehn2, J Zimmermann1, J Jordan2, K Kolatzki1, N Monserud1, Y Ovcharenko3, M Sauppe1, B Schütte1, R Tanyag1, A Ulmer2, B Kruse4, K Sander4, C Peltz4, A Colombo5, A D’Elia6, M diFraia7, L Giannessi7, P Piseri5, O Plekan7, K Prince7, M Zangrando7, C Callegari7, MJJ Vrakking1, A Rouzée1, T Möller2, T Fennel2, and •D Rupp1 — 1MBI Berlin, Germany — 2TU Berlin, Germany — 3E-XFEL, Schenefeld, Germany — 4Uni Rostock, Germany — 5Uni Milano, Italy — 6Uni Trieste, Italy — 7Elettra, Trieste, Italy
Diffraction imaging with intense, coherent, short-wavelength light pulses is a unique method to determine the structure of individual nanometer-sized objects such as viruses or fragile superfluid helium nanodroplets. In addition, diffraction imaging can be also used as a probe for ultrafast electronic processes within the particle. As the photons are elastically scattered by the electrons bound to the particle, the scattering response will be altered if the particle’s electronic structure changes, with particularly strong effects at electronic resonances. In two experiments we employed this concept using extreme ultraviolet (XUV) multicolor pulses from an intense high-harmonic generation source and two-color pulses from the FERMI free-electron laser, respectively, to resonantly image helium nanodroplets and trace light induced excitation and ionization processes within them.