Abstract: Anovel organic and inorganic hybrid material was prepared from a nonlinear optically active imidazole derivative 4HAPN and metal alkoxide of Ta(Ⅴ) via sol-gel process. The structure of hybrids film was analyzed by FTIR and SEM, the poled film exhibits a good oriention stability analyzed by electrochromic method. The permitivity and dielectric loss were calculated from measurements made with HP4192A Impedance Analyzer. The hybrid film shows low dielectric constants and low dielectric loss. The second order nonlinear and pyroelectric properties of the hybrid film were investigated in terms of the SHG and pyroelectric coefficient measurement. The SHG coefficient, d₃₃was found to be 17.2 pm/Vat the fundamental wavelength of 1064 nm and the pyroelectric coefficient was found to be 4.3×10^-6C/(cm²·K).

Key words: Organic-inorganic hybrid thin film, Second-order nonlinear optical property, Pyroelectric property