1. Department of Physics, NPR College of Engineering and Technology, Natham. Dindigul-624 401, India.
2. Department of Physics, Governement Arts College, Melur-625 106, Madurai, India.
3. Center for Environmental Studies and Green Energy Center, Department Of Environmental Science and Engineering, College of Engineering, Kyung Hee University, Seocheon-dong 1, Giheung-gu, Yongin-Si, Gyeonggi-Do, 446-701, South Korea.