Second harmonic generation in organically modified sol-gel films
Second harmonic generation in organically modified sol-gel films
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DOI：
10.1021/cm00020a004
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发表时间：
1992-03
影响因子：
8.6
通讯作者：
Jongsung Kim;J. Plawsky;R. LaPeruta;G. Korenowski
中科院分区：
文献类型：
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作者：
Jongsung Kim;J. Plawsky;R. LaPeruta;G. Korenowski
Pelt 1234开发了极化过程以在聚合物基质中抑制非线性发色团，已经开发了各种客体-主体系统和极化技术。发色团与聚合物主链的物理掺杂5或化学键合6都可以使用，但后者具有交联聚合物结构，是优选的，因为它提供了高密度的光学非线性基团和更好的系统稳定性。7溶胶-凝胶法是一种在低温下通过化学反应制备三维无机网络的方法，类似于有机体系中的分步反应聚合。8最近，许多新颖的复合光学材料已通过溶胶-凝胶法以块状或薄膜形式制备。这些复合材料具有有机材料的大的光学非线性和无机材料的环境和机械稳定性。上述所有溶胶-凝胶衍生材料均通过物理共混或掺杂制成。进一步受益
Pelt1 234 developed the poling process to alignnonlinear chromophores in a polymer matrix, various guest-host systems and poling techniques have been developed. Either physical doping5 or chemical bonding6 of the chromophores to the polymer backbone can be used, but the latter, with a cross-linked polymer structure, is pre-ferred because it provides for high densities of optically nonlinear groups and better system stability. 7 The sol-gel process is a method for producing a three-dimensional inorganic network by chemical reaction at low temperature and is analogous to step reactionpolymeri-zations in organic systems. 8 Recently many novel, com-posite, optical materialshave been prepared by the sol-gel process9 1011" 12 either in bulk or film form. These composite materials possess the large optical nonlinearity of an or-ganic material and the environmental and mechanical stability of an inorganic material. All the sol-gel derived materials mentioned above have been made by physical blending or doping. Further benefit