1. University of Sfax, Laboratory of Spectroscopic Characterization and Optics of Materials, Faculty of Sciences, BP 1171, 3000, Sfax, Tunisia
2. GREMAN UMR 7347-CNRS, CEA, INSACVL, University of Tours, Blois, France
3. Department of Physics, Faculty of Science, King Khalid University, PO Box 9004, Abha 61413, Saudi Arabia
4. Université de Tunis El Manar, Laboratoire LMOP, LR99ES17, El Manar, 2092 Tunis, Tunisia