1. Department of Physics and Material Science, Madan Mohan Malaviya University of Technology (MMMUT), Gorakhpur, Uttar Pradesh, India
2. Department of Applied Sciences, Physics Division, National Institute of Technology Delhi, Delhi, India
3. Department of Electronics and Communication Engineering, MMMUT, Gorakhpur, Uttar Pradesh, India
4. Madhav Institute of Technology and Science, Gwalior, India