1. Department
of Physics, Coimbatore Institute of Technology, Coimbatore 641014, India
2. Faculty
of Engineering and Business Administration, Western Norway University of Applied Sciences, 5063 Bergen, Norway
3. Amrita Centre for Industrial Research & Innovation (ACIRI), Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, Amrita University, Coimbatore, Tamil Nadu 641112, India