项目名称: 金纳米棒诱导纳米结构的等离激元杂化特性研究和SERS应用
项目编号: No.11304054
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 胡志健
作者单位: 国家纳米科学中心
项目金额: 25万元
中文摘要: 研究基于金纳米棒诱导纳米结构的局域表面等离激元(LSP)耦合杂化新机理和新特性,实现LSP的耦合、增强、约束;构建基于径向偏振光的表面等离子激元耦合表面增强拉曼(SERS)光谱系统。研究内容包括:(1) 金纳米棒诱导纳米结构的优化设计制备,包括:核壳杂化结构和非对称性线性组装体,实现具有优异场增强和耦合特性的等离子体结构;(2)金纳米棒诱导纳米结构中的LSP耦合杂化和Fano共振物理机制,包括:共振性质、色散性质、场的局域化增强,实现对LSP耦合调控;(3) 基于聚焦径向偏振光的表面等离激元耦合的SERS光谱系统,包括:聚焦条件下的表面等离子激元光学虚拟探针,虚拟探针与金纳米棒吸附分子的相互作用机制,拓展具有高灵敏度、高分辨率、高激发效率的SERS光谱技术。
中文关键词: 表面等离激元;金纳米棒;法诺共振;圆二色性;
英文摘要: We study the new mechanisms and characteristics of plasmon coupling of gold nanorod guided nanostructures to realize the localized surface plasmon (LSP) coupling, enhancement and confinement. The surface plasmon coupling SERS system based on tightly focused radially polarized beam (RP) is proposed and will be installed.The research contents include: (1)The optimal design and preparation of gold nanorod guided structures,including nanoshell hybrid structures and asymmetry assemblies; and realization of plamonic nanostructure with highly field enhancement and coupling;(2)The physics mechanism and charateristics of plasmon coupling hybridization and Fano resonance, including: resonance, dispersion and localized field enhancement; and realization of control of LSP coupling hybridization;(3)The surface plasmon coupling SERS system based on tightly focused RP beam, including: SPP optical virtual probe, the interaction of gold nanorod absorbed molecule s and SPP virtual probe;development of SERS spectroscopic technique with high sensitivity, high spatial resolution and high excitation effciency.
英文关键词: surface plasmon polarition;gold nanorods;fano resonance;circular dichroism;