1. Institute of Pharmacy, University of Hamburg, Bundestrasse 45, 20146 Hamburg, Germany
2. Institute of Nanostructure and Solid State Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
3. Institute of Physical Chemistry, University of Hamburg, Grindelalle 117, 20146 Hamburg, Germany
4. Physics Department, Faculty of Science, Ain Shams University, Cairo 11566, Egypt
5. The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany