1. Department of Physics, Faculty of Engineering and Technology (ITER), Siksha “O” Anusandhan Deemed to be University, Bhubaneswar 751 030, Odisha, India
2. Department of Physics, CSET, University of South Africa, Florida Science Campus, Private Bag X6, Christiaan de Wet and Pioneer Avenue, Florida Park, Florida 1710, Johannesburg, South Africa
3. Department of Physics, Tamkang University, Tamsui, Taipei 251, Taiwan