1. P. G. Department of Physics, Sardar Patel University, Vallabh Vidyanagar, Gujarat 388120, India
2. Electronics and Mechanical Engineering School, Vadodara, Gujarat 390008, India
3. Gujarat Technological University, Ahmedabad, Gujarat 382424, India
4. Department of Physics, Netaji Subhas University of Technology, New Delhi 110078, India
5. P. G. Department of Applied & Interdisciplinary Sciences, Sardar Patel University, Vallabh Vidyanagar, Gujarat 388120, India
6. ITM (SLS), Baroda University, Paldi, Vadodara, Gujarat 391510, India