1. Electrical Engineering Department, Indian Institute of Technology Bombay, Mumbai, India
2. Atomic, Molecular and Optical Physics Division, Physical Research Laboratory, Ahmedabad, India
3. Department of Electronics and Communication Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, India
4. Department of Electrical Engineering, Sensor and Optoelectronics Research Group (SORG), Indian Institute of Technology Patna, Patna, Bihar, India