1. PG and Research Department of Physics, Bishop Heber College, Bharathidasan University, Tiruchirapalli, Tamil Nadu, India
2. Department of Physics, Saranathan College of Engineering, Anna University, Tiruchirappalli, Tamil Nadu, India
3. PG and Research Department of Physics, Rajah Serfoji Government College, Bharathidasan University, Thanjavur, Tamil Nadu, India
4. Department of Physics, S. I. C. E. Socitey’s Degree College of Arts, Science and Commerce, Thane, Maharashtra, India
5. School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, Maharashtra, India