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首页> 外文会议>Conference on Nonlinear Optics Jul 28-Aug 2, 2002 null >Hybrid Covalent/Ionic Self-Assembly of Organic Second Order Nonlinear Optical Films
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Hybrid Covalent/Ionic Self-Assembly of Organic Second Order Nonlinear Optical Films

机译：有机二阶非线性光学薄膜的共价/离子混合自组装

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摘要

Ionically self-assembled monolayer (ISAM) films have been shown to spontaneously produce noncentrosymmetric ordering that gives rise to a substantial second order nonlinear optical (NLO) response. Previously, the ISAM films for NLO response consisted of bilayers of oppositely charged polymers whose thickness can be controlled through variation of pH and ionic strength of the immersion solutions. Here, we present an approach that replaces the NLO-active polymer layers with layers of monomeric chromophores containing ionic and covalent bonding sites. We have examined the effect of the pH of the immersion solutions on the orientation the of monomeric chromophores and demonstrated bulk polar ordering with χ~(2) values six times larger than quartz.
机译：离子自组装单层（ISAM）膜已显示出自发产生非中心对称有序性，从而引起了实质性的二阶非线性光学（NLO）响应。以前，用于NLO响应的ISAM膜由带相反电荷的聚合物的双层组成，其厚度可通过改变溶液的pH值和离子强度来控制。在这里，我们提出了一种方法，用含有离子键和共价键位的单体生色团层代替NLO活性聚合物层。我们已经检查了浸没溶液的pH值对单体发色团的取向的影响，并证明了体极性有序，其χ〜（2）值是石英的六倍。

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