1. School of Studies in Physics and Astrophysics; Pt. RaviShankar Shukla University; Raipur (C.G.) India
2. Department of Applied Physics; Raipur Institute of Technology, Chhatauna, Mandir Hasuad; Raipur 492101 (C.G.) India
3. Department of Electrical and Electronics Engineering; Chhatrapati Shivaji Institute of Technology; Shivaji Nagar (C.G.) India