1. Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
2. DST PURSE Program, Mangalore University, Mangalagangotri, Mangalore, Karnataka, 574199, India
3. Department of Physics, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal, 576104, India