1. Department of Physics, MRK Institute of Technology, Kattumannarkoil, Tamilnadu, India
2. Department of Physics, Annamalai University, Tamilnadu, India
3. Department of Physics, Aarupadai Veedu Institute of Technology, Vinayaka Mission’s Research Foundation, Chennai, Tamilnadu, India
4. Department of Physics, Salem Sowdeswari College (Govt. Aided), Salem, Tamilnadu, India