1. Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy
2. Centre for Photonics and Smart Materials, Zewail City of Science, Technology and Innovation, October Gardens, 6th of October City, Giza 12578, Egypt
3. Centre for Nanotechnology, Zewail City of Science, Technology and Innovation, October Gardens, 6th of October City, Giza 12578, Egypt
4. Nanotechnology and Nanoelectronics Engineering Program, Zewail City of Science, Technology and Innovation, October Gardens, 6th of October City, Giza 12578, Egypt
5. Physical Chemistry, Linz Institute for Organic Solar Cell (LIOS), Johannes Kepler University Linz, Altenbergerstr, 69, A-4040 Linz, Austria
6. Department of Physics, Faculty of Science, Ain Shams University, Abbassia, 11566 Cairo, Egypt
7. Light Technology Institute, Karlsruhe Institute of Technology, Engesserstrasse 13, 76131 Karlsruhe, Germany
8. Mathematics and Engineering Physics Department, Faculty of Engineering, University of Mansoura, Mansoura 35516, Egypt
9. Department of Electronics and Communication Engineering, Faculty of Engineering, University of Mansoura, Mansoura 35516, Egypt
10. Dipartimento di Fisica and IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci, 32-20133 Milano, Italy