Institution: | 1.Department of Physics, Laser and Fibre Optics Centre, University of Cape Coast, Cape Coast, Ghana ;2.Department of Applied Physics, University for Development Studies, Navorongo, Ghana ;3.Department of Mathematics, University of Cape Coast, Cape Coast, Ghana ;4.Department of Physics, Pennsylvania State University, Altoona, USA ;5.Materials Research Institute, Pennsylvania State University, University Park, USA ; |