1. Center Research in Microelectronics and Nanotechnology (CRMN), Hammam-Lif, Tunisia
2. Department of Physics, College of Science, University of Hail, Hail, Saudi Arabia
3. Laboratory of Electronics and Microelectronics, University of Monastir, Monastir, Tunisia
4. Laboratoire de Mathématiques et Physique, Université de Perpignan Via Domitia, Perpignan, France