Hannover 2020 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 6: Atomic clusters (joint session A/MO)

A 6.2: Hauptvortrag

Montag, 9. März 2020, 14:30–15:00, a320

Imaging anisotropic dynamics in superfluid helium nanodroplets — •B. Langbehn¹, K. Sander², Y. Ovcharenko^1,3, C. Peltz², A. Clark⁴, M. Coreno⁵, R. Cucini⁶, A. Demidovich⁶, M. Drabbels⁴, P. Finetti⁶, M. Di Fraia^6,5, L. Giannessi⁶, C. Grazioli⁵, D. Iablonskyi⁷, A. C. LaForge⁸, T. Nishiyama⁹, V. Oliver Álvarez de Lara⁴, P. Piseri¹⁰, O. Plekan⁶, K. Ueda⁷, J. Zimmermann^1,11, K. C. Prince^6,12, F. Stienkemeier⁸, C. Callegari^6,5, T. Fennel^2,11, D. Rupp^1,11,13, and T. Möller¹ — ¹TU Berlin — ²Univ. Rostock — ³European XFEL — ⁴EPFL Lausanne — ⁵ISM-CNR Trieste — ⁶Elettra-Sincrotrone Trieste — ⁷Tohoku Univ. Sendai — ⁸Univ. Freiburg — ⁹Kyoto Univ. — ¹⁰Univ. di Milano — ¹¹MBI Berlin — ¹²Swinburne Univ. of Tech. — ¹³ETH Zürich

Intense short-wavelength light pulses from free-electron lasers (FELs) enable the study of the structure and dynamics of nanometer-sized particles in the gas phase using coherent diffraction imaging methods. In our experiment, we explored the light induced dynamics of xenon doped helium nanodroplets. We used intense near-infrared pulses to ignite a nanoplasma inside the droplets. After a variable time delay of up to 800 ps, we imaged the dynamics triggered by the nanoplasma using extreme ultraviolet pulses from the FERMI FEL. The recorded scattering patterns exhibit pronounced directionalities that can be attributed to anisotropic changes of the droplet surface. A possible connection of these directed dynamics to the droplet’s vortex structure will be discussed.