一种含茚结构的无机-有机非线性光学材料的合成和性能

合成了一种含茚结构的有机生色团分子,通过红外光谱、核磁共振、元素分析和紫外-可见吸收光谱对其结构进行表征,并通过溶剂变色法估算了βCTμg值,显示出较高的非线性光学性质.将生色团分子和ICTES进行加成反应制备获得硅氧烷染料,并和TEOS经过Sol-Gel反应制备出无机-有机杂化薄膜.使用原位二次谐波方法表征了薄膜的二阶非线性光学性能及其热稳定性,表现出良好的极化取向稳定性,凸现杂化材料的优势.     

Novel metal-dielectric metameric optical filters for optical security devices

Optical security devices play an essential role in the fight against counterfeiting. In this paper, we study and design a pair of metal-dielectric optical filters based on metameric effect, which offer a hidden image effect by the color shift at a specific angle of observation. Compared with all-dielectric multilayer system, the metal-dielectric multilayer structure has larger color shift with varying incident angle, higher color saturation and fewer layers. Finally, the stacks with 5 layers and 7 layers are achieved, and the color difference index is only 0.71, which shows good metameric matching effect. Simultaneously, the sensitivity of filters to deposition errors is analyzed when the thickness deviation is ±2%, and the results show that the two filters have good manufacturability.     

逐层自组装技术制备二阶非线性光学薄膜的研究进展

逐层自组装(layer-by-layer self-assembly)技术制备光学功能薄膜和器件,具有可设计性强,可实现组成剪裁和微结构调控,对研究发展一类新型光子学材料、器件与微系统有重要理论意义和广阔应用前景,是一个很具前瞻性的研究新领域.着重综述逐层自组装二阶非线性光学薄膜材料制备技术、特性及其应用;评述了分别基于共价键和离子键力的逐层自组装技术特征、研究进展与面临的主要问题及其发展趋势和前景.     

键连Y型生色团的无机-有机杂化材料的制备及其非线性光学性能

合成了具有两个反应活性中心的Y型有机生色团3-(4'-硝基苯)-5,6-二-(4'-羟基苯)-1,2,4-三嗪(DBPNPT),与硅氧偶连剂异氰酸基-丙基-三乙氧基-硅烷(ICTES)反应生成新型的带有两个活性反应基团的硅氧烷染料DBPNPT-ICTES,并利用溶胶-凝胶技术将其与正硅酸乙酯(TEOS)反应生成双点键连型无机-有机杂化薄膜材料.经溶剂变色法计算生色团DBPNPTβCTμg值为37.9*10-30esu·D,并且生色团和硅氧烷染料具有良好的可见光波段透明性,较好的解决了"非线性-透明性矛盾".