1. Department of PhysicsCMR Technical CampusMedchelHyderabadTelangana501 401India
2. Department of PhysicsGITAM Institute of Technology GITAM UniversityVisakhapatnamAndhra Pradesh530045India
3. Thin Films and Materials Research LaboratoryDepartment of Physics Dayanand Science CollegeLaturMaharashtra413 512India