研究了掺杂CdS纳米粒子的有机聚合物体系的光折变效应,体系中以CdS纳米粒子为光敏剂,聚乙烯咔唑(PVK)为载流子输运剂,4(4硝基苯偶氮)苯胺染料(DO3)为非线性生色团,9乙基咔唑(ECZ)为增塑剂。反胶束法合成的CdS胶束颗粒采用紫外可见吸收光谱和透射电子显微镜(TEM)表征,结果表明,具有纳米尺寸和量子限制效应。研究了PVK-CdS薄膜的光电导特性,实验结果表明,CdS纳米粒子与PVK之间的电荷转移可以有效的提高PVK的光电导率。双光束耦合实验证明了该体系的光折变特性,在无外加电场下,获得二波耦合增益系数78.4 cm-1,分析表明聚合物薄膜具有强的光致取向增强效应；样品在两相干光束作用下,可建立折射率光栅,其衍射效率达到4.4%。

The organic-inorganic hybridized polymer system is studied for its photorefractive, which is sensitized by CdS nanoparticles, and combines PVK polymer to transmit carriers, DO3 nonlinear chromophores and ECZ as plasticizer. It is confirmed that the CdS colloidal particle has a nanoscale size and quantum confinement effect by adopting transmission electron microscopy and UVVisible absorption spectroscopy. The photoconductive properties of the PVK-CdS thin films is studied. Significant enhancement in photoconductivity induced by charge transform between CdS nanoparticles and PVK has also been demonstrated. An asymmetric twobeam coupling gain of 78.4 cm-1 is obtained without the external electric field, confirming the photorefractive effect of the polymer. The experimental results showed that the polymer film possesses strong photoinduced orientationenhanced photorefractive effect. When irradiated by two coherent beams, the sample can set up refractive index grating with the diffraction efficiency of 4.4%.