1. Department of Mechanical Engineering, Indian Institute of Technology, Jodhpur, Rajasthan, India.
2. Department of Electrical Engineering, Indian Institute of Technology, Jodhpur, Rajasthan, India.
3. Institute for Physics of Microstructures RAS, GSP-105, Nizhny Novgorod, 603950, Russia and Lobachevsky State University, Nizhny Novgorod, 603950, Russia.
4. Department of Electrical Engineering, Indian Institute of Technology, Jodhpur, Rajasthan, India. (e-mail: mkumar@iitj.ac.in)