非线性光学聚合物材料

非线性光学聚合物是一类新型的功能高分子材料，在光电子技术和集成光学等领域有广阔的应用前景，文中在介绍非线性光学效应和极化原理的基础上，综述了非线性光学聚合物材料研究现状及进展，着重阐述了掺杂型，功能型及共轭型等非线性光这聚合物的结构与性能，应用优势的存在的问题，并指出了这类材料的研究方向和发展趋势。     

非线性光学聚合物材料

在简述非线性光学原理的基础上，指出了非线性光学聚合物材料的应用优势，以二阶极化聚合物为重点，综述了非线性光学聚合的进展。     

三次非线性光学中的有机和聚合物材料

近年来的研究结果表明，在非线性光学中一些有机和聚合物材料具有许多优越性。它们表现出的较强的三次非线性光学性质和其结构特点相联系。本文对几类重要的有机和聚合物三次非性线性光学材料作一简单的评价，并介绍几种这类晶体与薄膜材料的制备形式。     

高分子非线性光学材料和有关研究

非线性光学材料是未来光通讯的关键材料，高分子非线性光学材料在高频电光调制器和半导体－非线性光学聚合物集成电路等尖端应用领域的研究引起了有关方面的高度重视。主要介绍有关高分子非线性光学材料的基本概念，二阶非线性光学高分子的种类和制备方法，作者和合作者近年来在聚合物非线性光学材料研究领域所做的工作。     

互穿聚合物网络（IPN）技术在功能高分子中遥应用

综述了互穿聚合物网络（ＩＰＮ）技术在功能材料中应用研究的进展。具体叙述功能膜材料、敏感性水凝胶、非线性光学极性聚合物，导电材料、药物控释体系等ＩＰＮ功能材料。     

具有二阶非线性光学特性的液晶聚合物

通过推导液体晶场中的二阶非线性光喾人理论上阐明了研究二阶非线性光学液晶聚合物的重要意义,从宾主掺杂体系和键合型液晶聚合物体系两个方面总结了这一领域近１０几年来的研究进展,并结合笔者的工作在系统综述具有二阶非线性光学特性液晶聚合物研究的基础上对这一领域的发展方向和前景进行了展望。     

有机三阶非线性光学材料的研究进展

非线性光学材料在图像处理、全光开关、光学存储和记忆系统等领域有着较大的应用潜力,近年来对三阶非线性光学聚合物材料的研究成为研究工作中的热点.分类介绍了各种有机三阶非线性光学聚合物的合成、结构与性能的最新研究进展,评述了三阶非线性光学性能表征技术的研究状况,展望了有机三阶非线性光学材料的前景和存在的问题.     

二阶非线性光学聚酰亚胺

综述了近年来采用芳香聚酞亚胺为骨架的主—客体掺杂型、主键型、侧链型和交联型的二阶非线性光学聚合物材料在合成方法、耐热性和取向稳定性等方面的研究进展情况，并根据目前存在的问题，展望了今后的研究方向。     

新交联型二阶非线性光学环氧聚合物的合成与表征

合成了一种含丙烯酰基团的热交联型二阶非线性光学聚合物材料,以提高其电场极化产生的偶极取向的稳定性。二次谐波产生测量表明,热交联聚合物具有高的以向稳定性。     

三阶非线性光学聚合物材料

自１９８７年以来，三阶非线性光学聚合物材料越来越引起研究者们的浓厚兴趣。由于聚合物三阶非线性光学材料具有较大的三阶非线性光学系数，快速响应过程、低的介电常数以及及修饰，易成型等特点，极有可能在２１世纪初获得大规模应用。本文介绍了近年来三阶非线性光滂聚合物的进展。     

Organic materials for nonlinear optics

This review discusses nonlinear optical (NLO) polymeric materials. As an example of a second-order NLO material, a novel copolymer with a diazo dye attached is investigated. The second-order NLO coefficient χ⁽²⁾ of the copolymer reaches 1.0 × 10^?6 esu, which is 7 times larger than that of LiNbO₃. A third-order NLO coefficient χ⁽³⁾ larger than 10^?10 esu is obtained for polymers where NLO dyes are introduced into the polymer backbone. The optical transmission loss of these polymers is revealed to be around 2 dB/cm. As these polymers can be formed into channel waveguides using the photo-bleaching technique, they show promise for use in NLO devices because of their processability, transparency and large optical nonlinearity.     

Fabrication of photonic nanostructures in nonlinear optical polymers

Two experimental techniques have been developed for creating photonic structures in nonlinear optical (NLO) polymers with precisions down to nanoscale. The first technique uses nanoimprinting technology to directly pattern the guest-host NLO polymers. It can be applied to the fabrication of photonic bandgap structures in NLO materials, as well as many other photonic structures in both linear and nonlinear polymers. The second technique utilizes self-assembly of NLO polymer monolayers onto a nanostructured template. This approach provides a highly effective means to implement practical waveguide devices using high performance self-assembled polymers with large electro-optic activity and inherent long-term stability. An optical switching device is proposed, based on nanofabricated NLO polymers.     

Synthesis and the third-order non-linear optical properties of new azobenzene-containing side-chain polymers

A new series of aromatic azobenzol compounds containing vinyl have been designed as monomers. The azobenzene-containing side-chain polymers containing azo NLO chromophore in each side chain have been synthesized via free radical polymerization. FT-IR, elemental analysis and ¹H NMR were performed to characterize the azo monomers. The molecular weight of the polymers and their distribution were determined by gel permeation chromatography (GPC). The third-order NLO coefficient of azo monomers and their polymers were measured by degenerated four wave mixing (DFWM) technique. As a result, the enhancement of the molecular conjugation and the increase of the NLO chromophore concentration in the molecular chain contribute much to heightening the third-order NLO effect. The electronic effect of substituent on the azobenzol group and the push–pull electronic structure contributes much to enhancing the NLO property.     

Synthesis and the third-order non-linear optical properties of new azobenzene-containing side-chain polymers

A new series of aromatic azobenzol compounds containing vinyl have been designed as monomers. The azobenzene-containing side-chain polymers containing azo NLO chromophore in each side chain have been synthesized via free radical polymerization. FT-IR, elemental analysis and ¹H NMR were performed to characterize the azo monomers. The molecular weight of the polymers and their distribution were determined by gel permeation chromatography (GPC). The third-order NLO coefficient of azo monomers and their polymers were measured by degenerated four wave mixing (DFWM) technique. As a result, the enhancement of the molecular conjugation and the increase of the NLO chromophore concentration in the molecular chain contribute much to heightening the third-order NLO effect. The electronic effect of substituent on the azobenzol group and the push–pull electronic structure contributes much to enhancing the NLO property.     

一种新型共轭接枝聚合物的合成及性能

将微波辐射合成的苯代三聚氰胺(BGA)-均苯四酸二酐(PMDA)体系的PAA与TDI-对位取代苯胺衍生物反应,通过改变TDI-对位取代苯胺衍生物的对位取代基来合成具有不同电子效应的侧链端基的接枝聚合物.用红外及核磁共振的测试方法对聚合物的结构进行表征.接枝聚合物具有较强的三阶非线性光学响应和较强的荧光性能.考察了侧链端基电子效应对聚合物三阶光学非线性极化率系数和荧光行为的影响.     

Relaxation behavior and nonlinear properties of thermally stable polymers based on glycidyl derivatives of quercetin

Cross-linked polymers on the basis of di-, tri and tetraglycidyl ethers of quercetin (3,3′,4′,5,7-pentahydroxyflavone) were synthesized, and then, poled in electrical field of corona discharge. Investigations of structural, thermal and optical parameters of the polymer films were carried out. It was found that the polymers obtained from di- and triglycidyl quercetin ethers had high values of macroscopic quadratic susceptibilities and substantial stability of nonlinear optical (NLO) properties after the poling. Tetraglycidyl ether of quercetin forms the polymer of lower quadratic susceptibility, which demonstrates noticeable relaxation process resulting in decrease of the NLO effect.It is supposed that the difference of the NLO properties is due to peculiarities of physical network of the polymers, namely to the ratio between numbers of hydrogen bonds formed by hydroxyl groups of chromophore fragments and by the ones of interfragmental parts of the polymeric chains.     

光致变色聚合物的光学性能与应用

综述了光致变色聚合物的光学性能及应用的近期研究进展，首先，介绍了光诱导双折射及双色现象形成机理及实验方法，并讨论了分子结构与外部条件对上述现象的影响。其次，介绍了光致变色聚合开关线性光学性能和应用。如由光助极化和全光极化形成的光开关现象将有可能引起数字存储或光-光开关等新装置的出现，最后，简单说明了光诱导表面光栅在近几年的研究情况，并分析了它们在全息图像存贮，光学过滤器及共振电偶中的潜在应用。     

非线性光学晶体LiB_3O_5研究进展(英文)

综述了硼酸盐非线性光学晶体LiB3O5(LBO)的研究进展。首先介绍了硼酸盐非线性光学晶体的背景及现状,重点介绍了硼酸盐非线性光学晶体的典型代表——LBO晶体的相关研究内容。然后从LBO晶体作为非线性光学晶体材料的发现到晶体生长和它在全固态激光中的应用等方面进行了讨论。最后,介绍了研究组过去几年中在LBO晶体研究方面取得的成果并展望了LBO晶体研究的未来发展方向。     

Polymers for Nonlinear Optics

Nonlinear optical (NLO) materials provide the basis for an array of active optical devices under development throughout several high technology industries. Applications would include communications, data storage, and computing. Active optical devices can be used to alter light in order to encode or direct information in a number of ways. While the applications of optical technology such as fiber optics, optical storage and optical displays have identified a need for such devices, material properties have so far limited their introduction. Intensive, world-wide, development of specifically designed polymers appears to offer the most attractive solution.     

New side-chain polyurethanes with highly conjugated push–pull chromophores for second order NLO applications

Six new side-chain polyurethanes with large molecular hyperpolarizabilities were synthesized by reaction of ethylenic and/or azo bridged push–pull chromophoric monomers with tolylene 2,4-diisocyanate. The NLO-phores show different conjugation pathway but analogous donor/withdrawing substituents. The chemical and thermal properties of the chromophores and of the polymers were examined. Evaluation of the second order NLO properties was performed by EFISH determination of μβ on the monomers, and by SHG measurements on some amorphous thin films obtained from polymers through spin-coating technique.