1. Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India 603203
2. National Institute of Standard and Technology, Gaithersburg, Maryland 20899, United States
3. Centre for Scientific and Applied Research (CSAR), IPS Academy, AB Road, Rajendra Nagar, Indore, India 452012
4. Materials and Device Laboratory, Department of Physics, Indian Institute of Technology Indore, Simrol, India 453552
5. Department of Electronics & Communication, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai, India 603203