1. PG & Research Department of Physics, Arignar Anna Govt. Arts College, Cheyyar, Tamilnadu, India
2. Thiruvalluvar University, Serkadu, Tamilnadu, India
3. Department of Physics, St. Joseph’s Institute of Technology, OMR, Chennai, Tamilnadu, India
4. Post Graduate and Research Department of Physics, Government Arts College, Tiruvannamalai, Tamil Nadu, India
5. Department of Physics, Dr. Ambedkar Govt. Arts College, Vyasarpadi, TamilNadu, India
6. Division of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamilnadu, India