Rostock 2019 – scientific programme

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A: Fachverband Atomphysik

A 19: Cluster I (joint session A/MO)

A 19.1: Invited Talk

Wednesday, March 13, 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.