关键词:

溶胶-凝胶, 二阶非线性光学, 偶氮苯生色团, 有机-无机复合, 甲基丙烯酸甲酯, 二氧化硅, 硫化镉

Abstract:

A new kind of bonded organic/inorganic composite second-order nonlinear optical(NLO) material containing 4-(4′-nitrophenyl-diazenyl)phenyl-1,3-diamine azobenzene (DAB) was synthesized through the sol-gel process by using 3-glycidoxy -propyltrimethoxysilane (KH-560) as coupler agent.The CdS nanoparticles surface-capped with AOT-SO^-₃［(bis- 2- ethylhexyl)sulfosuccinate］ was doped into the above nanocomposites NLO material.After corona polarization at 160℃ and 6000V for 1 h, with CdS content increasing, the polarized film order parameter increased from 0.278 to 0.375 and second-order NLO coefficient increased from 7.784× 10^-9esu to 7.556×10^-7esu.After corona polarization of the film at 150℃ and 7000 V for 1 h, the second-order NLO coefficient could reach 8.638×10^-7esu according to one dimensional rigid oriented gas model (1DROGM).The three-dimensional networks could restrict the dipole alignment relaxation of NLO chromophores.The results showed that this bonded polymer film had a high NLO capability at room temperature.The order parameter could maintain about 95% of its initial value at 100℃ for 400 h.

Key words:

溶胶-凝胶, 二阶非线性光学, 偶氮苯生色团, 有机-无机复合, 甲基丙烯酸甲酯, 二氧化硅, 硫化镉