1. Physics Department, NRI College of Engineering and Management, Baraghata, NH-75, Jhansi Road, Gwalior (M.P.) 474001, India
2. Applied Physics Group, ABV-Indian Institute of Information Technology and Management, Morena Link Road, Gwalior (M.P.) 474010, India
3. School of Studies in Physics, Jiwaji University, Gwalior (M.P.) 474012, India