1. Laboratory for the Study of Advanced Materials and Applications (LEM2A), Physics Department, Moulay Ismail University of Meknes, B.P. 11201, Zitoune, Meknes, Morocco
2. Department of Physics, FST, Institute of Electronics, Microelectronics and Nanotechnology, CNRS–UMR 8520, University of Lille, Villeneuve d’Ascq 59652, France
3. Institute of Electronics, Microelectronics and Nanotechnology, CNRS UMR 8520, LIA LEMAC-LICS, Centrale Lille, University of Lille, Lille F-59000, France