1. Department of Physics, St. Jude’s College, Thoothoor, Manonmanium Sundaranar University, Tirunelveli, India
2. Department of Physics, Sree Ayyappa College for Women, Nagercoil, India
3. Department of Physics, St. Jude’s College, Thoothoor, Kanyakumari, India
4. Department of Physics (SF), N.M.S.S.V.N. College, Madurai, India