1Research Scholar, PG Research Department of Physics, Kamarajar Government Arts College, Surandai-627859, Tamil Nadu (India), Affiliated to Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli-627012, Tamil Nadu (India)
2Assistant Professor, PG Research Department of Physics, Kamarajar Government Arts College, Surandai-627859, Tamil Nadu (India), Affiliated to Manonmaniam Sundaranar University, Abishekapatti,Tirunelveli-627012, Tamil Nadu (India)