1. Department of Applied Physics, Sri Venkateshwara College of Engineering, Sriperumbudur, India
2. Department of Physics, S.A. Engineering College, Chennai, India
3. Department of Physics, Bon Secours Arts and Science College for Women, Mannargudi, India
4. Department of Applied Physics, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, India
5. Department of Physics, Bharath Institute of Higher Education and Research, Chennai, India