1. Physics Research Centre, Department of Physics, St. Xavier's College (Autonomous), Palayamkottai, Tamilnadu, India
2. Department of Chemistry, St. Xavier's College (Autonomous), Palayamkottai, Tamilnadu, India
3. Tiruvalluvar Engineering College, Vandavasi, Tamil Nadu, India
4. Department of Physics, Loyola College, Oilpatti, Mettla, Tamilnadu, India
5. Department of Pure and Applied Physics, Guru Ghasidas Vishwavidyalaya, Chhattisgarh, India