Investigation of Photo Sensitive Properties of Ferroelectric Stannous Chloride Dihydrate Doped Triglycine Sulphate (SnCl2.2H2O-TGS) Crystal by Pseudo Spin Lattice Coupled Mode (PLCM) Model. IJPAP. 2026;64(4). doi:10.56042/ijpap.v64i4.26122