界面SPR模式及近场增强光谱学研究

项目名称： 界面SPR模式及近场增强光谱学研究

项目编号： No.11474239

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 杨志林

作者单位： 厦门大学

项目金额： 96万元

中文摘要： 金属纳米结构中特定表面等离激元模式的光学激发及其相互作用是发展表面增强拉曼光谱（SERS）、针尖增强拉曼光谱（TERS）、二次谐波（SHG）等有关高分辨、高灵敏、高精度界面光谱学的物理基础。本项目主要致力于探索金属纳米结构在固-气、液-液及固-液界面各种表面等离激元共振模式的分类识别及其相互影响，进而利用SPR的近场增强效应深入发展SERS、TERS及SHG光谱等各类高灵敏度，高空间分辨率的界面光谱学方法。通过理论分析并结合实验研究，重点探索各类SPR模式的本质特点及激发条件。在此基础上，通过制备和优化界面结构及激光光路，充分利用各SPR模式间以Fano共振为核心的有效耦合，进一步提高SERS、TERS及SHG等光谱技术的灵敏度及分辨率。项目完成后，有望在表面等离激元光学中的基础物理问题及界面超高灵敏度激光光谱学领域取得原创性成果。本项目预计将在国际权威期刊上发表8至10篇高水平研究论文。

中文关键词： 表面等离激元共振；表面增强拉曼光谱；针尖增强拉曼光谱；二次谐波；界面

英文摘要： The optical excitation of specific surface plasmon modes and the interactions between them in metal nanostructures are the physical foundations of the enhanced surface/interface spectroscopy with high resolution, high sensitivity and high accuracy. Surface Enhanced Raman Spectroscopy (SERS), Tip Enhanced Raman Spectroscopy (TERS) and Second Harmonic Generation (SHG) are typical Enhanced Spectroscopy at interfaces. This project is mainly committed to the explorations of the optical excitation conditions of different surface plasmon resonance modes and the interactions between them at various kinds of interfaces, including solid/gas, liquid/liquid and solid/liquid interfaces. Making fully use of the SPR-based near-field enhancement, we can further develop SERS, TERS,SHG and other kinds of interface spectroscopy with high sensitivity and spatial resolution. Combing theoretical analysis with experimental studies, we are dedicated to the exploring the essential characters and excitation conditions of various SPR modes at interfaces. Based on the optimizing of the interface structures and laser source, and making the most use of effective coupling effect between different SPR modes, especially through the Fano resonance, the sensitivity and spatial resolution of SERS, TERS and SHG could be ultimate improved dramatically. After the completion of the project, some original achievements, including both the basic physical principle of surface plasmon and the development of high precision enhanced interface spectroscopy, are expected to obtain. 8 to 10 research papers are expected to be published on international journals with high impact.

英文关键词： surface plasmon resonance;SERS;TERS;SHG;interface