1. Department of Physics, R&D Centre, Bharathiar University, Coimbatore, India
2. Department of Physics, Shree Chandraprabhu Jain College, Minjur, Tamil Nadu, India
3. Department of Physics, Saveetha Engineering College (Autonomous), Thandalam, Chennai, Tamil Nadu, India
4. Department of Physics, Presidency College, Chennai, Tamil Nadu, India
5. Department of Physics, Kings Engineering College, Sriperumbudur, Chennai, Tamilnadu, India