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Time-resolved quantum beats in the fluorescence of helium resonantly excited by XUV radiation
AC LaForge, A Benediktovitch, V Sukharnikov +18
We report on the observation of time-resolved quantum beats in the helium fluorescence from the transition 1s3p -> 1s2s, where the initial state is excited by XUV free-electron las…
Improved stabilization scheme for extreme ultraviolet quantum interference experiments
Daniel Uhl, Andreas Wituschek, Ulrich Bangert +18
Interferometric pump-probe experiments in the extreme ultraviolet (XUV) domain are experimentally very challenging due to the high phase stability required between the XUV pulses.…
Collective enhancement of above threshold ionization by resonantly excited helium nanodroplets
R. Michiels, M. Abu-samha, L. B. Madsen +18
Clusters and nanodroplets hold the promise of enhancing high-order nonlinear optical effects due to their high local density. However, only moderate enhancement has been demonstrat…
Unravelling the Full Relaxation Dynamics of Superexcited Helium Nanodroplets
Jakob D. Asmussen, Rupert Michiels, Katrin Dulitz +20
The relaxation dynamics of superexcited superfluid He nanodroplets is thoroughly investigated by means of extreme-ultraviolet (XUV) femtosecond electron and ion spectroscopy comple…