1. Centre for Scientific and Applied Research (CSAR), PSN College of Engineering and Technology, Tirunelveli, India
2. Department of Physics, Pondicherry University, Puducherry, India
3. Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore, India
4. Department of Physics, Coimbatore Institute of Technology, Coimbatore, India