Department of Physics;
Swami Dayananda College of Arts and Science;
Manjakkudi;
Tamilnadu;
India;
Department of Physics;
Government Arts College (Autonomous);
Kumbakonam;
Tamilnadu;
India;
Nonlinear; Optical; Tristhiourea; Lanthanum; Nitrate; Second; Harmonic; Generation; Thermo; Gravimetric; Analysis; Differential; Thermal; Analysis;