1. Department of Physics, Devanga Arts College (Autonomous), Aruppukottai, India
2. P.G. & Research Department of Physics, AVVM Sri Pushpam College (Autonomous), Thanjavur, India
3. P.G. & Research Department of Physics, Thiagarajar College, Madurai, India
4. Department of Physics, Bharathidasan University Constituent College (Women), Orathanadu, India