[1] PG& Research, Department of Physics, Thiru.Vi.Ka. Govt. Arts College, Thiruvarur 610 003, (Affiliated to Bharathidasan University, Tichy), Tamil Nadu
[2] PG& Research, Department of Physics, Annai Velankanni College, Tholayavattam, Kanyakumari (Affiliated to Manonmaniam Sundaranar University)
[3] Department of Physics, ADM College for Women (Autonomous), Nagapattinam 611 001,(Affiliated to Bharathidasan University,Tichy), Tamil Nadu