1. Department of Physics; Acharya Nagarjuna University; Guntur AP India
2. Department of Physics; University College of Engineering and Technology; Acharya Nagarjuna University; Guntur AP India
3. Faculty of Physics; Opole University of Technology; Opole Poland
4. ECE Department; VIT-AP; Amaravati AP India
5. Department of Chemistry and Research Institute; SRM Institute of Science and Technology (SRMIST); Chennai India