含偶氮分子的键合型PMMA／SiO2复合材料的制备及二阶非线性光学性能

Preparation of PMMA/SiO_2 Composite Material Containing Azo-dye Molecules and Its Second-Order Nonlinear Optical Properties

用溶胶-凝胶法合成了含4-(4′-对硝基偶氮苯)-3-氨基-苯胺(DAB)生色团的键合型有机/无机复合非线性光学材料。由一维刚性取向气体模型计算复合材料的二阶非线性光学系数(d33)为7.784×10-9esu。这种有机生色团与无机玻璃键合形成的交联网络结构中,无机玻璃的刚性三维结构能有效抑制非线性光学(NLO)生色团的极化松弛。去极化实验结果表明,复合材料的非线性光学性能的常温稳定性好,在100℃放置400 h序参数仍保持初值的95%以上。

A new kind of bond organic/inorganic composites second-order nonlinear optical （NLO） material containing 4-（ 4 ＇-Nitrophenyl-diazenyl ） phenyl-1, 3-diamine azobenzene （ DAB ） was synthesized through sol-gel process. The second-order NLO coefficient （ d33 ） of poled film is 7.784 × 10^-9 esu according to one dimensional rigid oriented gas model （1DROGM）. The three-dimensional networks can restrict the dipole alignment relaxation of NLO ehromophores. The results show that this bonded polymer film has a high NLO capability at room temperature. The order parameter can maintain about 95 % of its initial value at 100 ℃ for 400 h.