1. School of Interdisciplinary Research, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
2. University of Queensland−IIT Delhi Academy of Research (UQIDAR), Hauz Khas, New Delhi 110016, India
3. Centre for Applied Research in Electronics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
4. Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India
5. Department of Physics, Shivaji College, University of Delhi, New Delhi 110027, India
6. Department of Electrical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India