1. Department of Electronics and Communication Engineering, National Institute of Technology Agartala, Jirania, West Tripura 799046, India
2. School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907
3. Department of Physics, National Institute of Technology Durgapur, Durgapur, West Bengal 713209, India
4. Department of Nanotechnology, North Eastern Hill University, Umshing, Mawkynroh, Shillong, Meghalaya 793022, India