Institution: | 1.Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt ;2.Geology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt ;3.Geology Department, Faculty of Science, Assiut University, Assiut, Egypt ; |