有机微纳结构的非线性光学特异性研究

项目名称： 有机微纳结构的非线性光学特异性研究

项目编号： No.51203165

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 有机高分子材料学科

项目作者： 闫永丽

作者单位： 中国科学院化学研究所

项目金额： 25万元

中文摘要： 高性能非线性光学材料是实现全光信息处理的关键。无机材料作为传统的非线性光学材料，已经在各个领域得到了广泛应用。与此同时有机材料正以其优异的性能、超快的响应、低廉的成本等优势越来越引起人们的关注。有机小分子可设计、易剪裁、便于组装，在聚集过程受氢键、π堆积、范德华力等不同驱动力作用，产物结构多样，对其非线性光学性质、特别是结构相关的二阶非线性极化率等光学参数有重要影响，有望为新型光子学材料和器件的发展带来新的契机。本项目提出利用分子聚集状态调控有机微纳结构的非线性光学性能，通过设计并筛选几类重要的非线性光学分子构筑一系列结构迥异的微纳结构，在纳米尺度上研究分子取向、排列间距、偶极夹角、晶形等结构特征与其非线性光学特异性的关联，揭示单体分子非线性光学性质在聚集过程中的传递和演化规律，从中总结出有机分子聚集体中的"结构效应"，为定向制备满足特定功能的微纳尺度非线性光子学器件奠定基础。

中文关键词： 纳米光子学；有机低维材料；非线性光学材料；纳米激光器；倍频材料

英文摘要： Nonlinear optical (NLO) material with high-performance is crucial to the realization of all optical information processing. Inorganic crystals, as a kind of traditional NLO materials, have been employed in a wide field. Organic counterparts are causing more and more attentions due to their excellent properties, ultrafast response, low cost and so on. Organic molecules, which can be synthesized and tailored easily with rational design, exhibit distinctive self-assembling properties. Driven by various intermolecular forces during aggregation process, such as hydrogen bonds, π-stacking, and Van de Waals interactions, molecules tend to form distinct micro/nanostructures. The controllability in organic structure characteristics is essentially important for the NLO properties, especially the second order NLO parameters that are dependent significantly on the structural symmetry. As a result, organic micro/nanostructures may offer a new route to develop novel nonlinear materials and photonic devices. In this project, we propose to finely tune the NLO properties of organic micro/nanostructures through modulating the assemble process of organic molecules. We will design and select several kinds of important NLO molecules, then construct a series of micro/nanostructures. By comparing the differences in NLO properties bet

英文关键词： nanophotonics；organic low-dimensional materials；nonlinear optical materials；nanolaser；frequency doubling material