金属微纳结构材料的非线性光学效应研究

项目名称： 金属微纳结构材料的非线性光学效应研究

项目编号： No.11274160

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 詹鹏

作者单位： 南京大学

项目金额： 80万元

中文摘要： 有关金属微纳结构材料及其光学新效应的研究是当今物理、材料、信息和生命科学及交叉领域的热点课题之一，因此对其基础问题的研究和潜在应用的探索有着非常重要的意义。本项目结合课题组的研究特色，研究金属微纳结构中的局域电、磁SP共振模式的激发特性，研究这些模式通过近场耦合、远场衍射耦合所带来的新效应，分析通过模式耦合进一步提高局域电场和局域磁场的强度，发展微纳结构中局域电磁场增强的新原理、新方法；利用单个结构单元的构型变化以及周期调制实现对金属微纳结构及其有序阵列中的电、磁SP共振模式和耦合效应的调谐；研究局域电场和局域磁场增强条件下的非线性光学特性，及相关非线性增强的微观理论模型；考察单元结构对称性以及点阵结构对称性对二次谐波、三次谐波产生的影响；研究这类金属微纳结构在表面增强拉曼散射方面的应用；结合材料的优化设计，发展具有SP共振、具有远近场耦合效应的金属纳米结构的制备及其精确调控的实验技术。

中文关键词： 磁等离激元；非线性光学；局域电磁场增强；金属纳米微结构；表面拉曼增强

英文摘要： Recently there has been an extensive worldwide effort to study the metallic microstructures and their corresponding novel optical effects, which has received tremendous attention in the research of physics, material science, information science, life science as well as their interdisciplinary. Therefore, the research for fundamental physics and the potential application shows a special importance. Combined with the characteristics of our group research, in this project, we study the fundamental characteristics of the localized electric and magnetic plasmon modes excited in the metallic microstructures. It is demonstrated that the localized plasmon modes could be coupled with each other to generate some novel optical effects. Accompanied with the interaction between plasmon modes, the intensities of the localized electric and magnetic fields are found to be greatly enhanced, which may open a new way to enhance the localized fields. Further tunability on the localized plasmon modes and their coupling effects could be gained either by tuning the morphology of the constitutes of the metallic microstructures, or by controlling the periods of the metallic microstructures. In particular, the nonlinear optical properties of the metallic microstructures themselves and the combination of the nonlinear materials and metal

英文关键词： Magnetic Plasmon；Nonlinear Optics；Enhancement of Localized Electric-magnetic Field；Metallic Microstructure；SERS