Affiliation: | 1.Department of Physics,Laser andFibre Optics Centre, University of Cape Coast,Cape Coast,Ghana;2.Department of Physics,ThePennsylvania State University,Altoona,USA;3.Materials Research Institute, ThePennsylvania State University,University Park,USA;4.Department of Mathematics,Universityof Cape Coast,CapeCoast,Ghana;5.Department of Applied Physics,University for Development Studies,Navorongo Campus,Ghana |