1. Department of Engineering Mathematics and Physics, Faculty of Engineering, Cairo University, Giza, Egypt
2. Department of Physics, Faculty of Sciences and Humanity Studies, Shaqra University, Shaqra, Saudi Arabia
3. Département de Physique, Laboratoire de Photonique d'Angers, UFR Sciences, Université d'Angers (UBL), Angers, France
4. Department of Chemistry, University of Patras, Patras, Greece