1. Department of Sciences, University College Groningen, University of Groningen, Hoendiepskade 23/24, 9718 BG Groningen, The Netherlands
2. Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
3. Centre for Theoretical Physics, The British University in Egypt, Sherouk City, 11837 Cairo, Egypt
4. Nanotechnology Research Centre (NTRC), the British University in Egypt (BUE), El Sherouk City, Suez Desert Road, Cairo 1183, Egypt