表面等离子体耦合共振发射的近场调控及其新型光学成像技术研究

项目名称： 表面等离子体耦合共振发射的近场调控及其新型光学成像技术研究

项目编号： No.11504244

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 杜路平

作者单位： 深圳大学

项目金额： 24万元

中文摘要： 针对目前近场光学显微镜在信号提取、信号增强、信号偏振选择性等方面存在的缺陷与不足，我们提出一种新型的基于金属颗粒-金属膜（NP-on-film）构型的扫描近场光学成像系统。利用NP-on-film结构的表面等离子体耦合共振和耦合发射效应，我们从简化成像系统、提升成像速度、增加成像信息量、提高成像分辨率等多个方面对目前的近场光学显微镜进行改良。本项目的研究内容包括：1）研究不同入射光偏振下，NP-on-film构型的表面等离子体耦合共振特性；2）研究表面等离子体耦合发射对散射光信号的光谱调制与增强作用；3）搭建基于金属颗粒-金属膜构型的扫描近场光学成像系统，实现对聚焦光场的偏振可选择性成像以及对纳米材料、纳米结构等的超分辨成像。此项研究不仅对近场光学成像技术本身有重要价值，而且作为一种有效的近场表征工具在纳米科学等基础研究领域具有重大意义。

中文关键词： 近场光学；扫描探针；表面等离子体；超分辨成像；耦合共振

英文摘要： In order to solving the problems associated with the current scanning near-field optical microscopy (SNOM), like the difficulties on extracting the signals from the background noises, the low collection efficiency of the signal and the polarization selectivity of the near-field probes, we propose and study a new type of scanning near-field imaging system based on the nanoparticle-on-film configuration. By making use of the plasmonic coupling between the nanoparticle and the adjacent metal film and the coupled emission of scattering light through the metal film, we focus on improving the performance of the current SNOM system through simplifying the system, speeding up the imaging process, increasing the imaging capacity and improving the imaging resolution. This project includes: 1) studying the plasmonic coupling properties of the NP-on-film configuration under different incident polarization; 2) studying the surface plasmon coupled emission (SPCE) of scattering light induced by the nanoparticle through the metal film, particularly, the effect of SPCE on modulating the resonant spectrum of the configuration and on enhancing the collection efficiency of the signal; 3) building a NP-on-film structure directed SNOM system, realizing the polarization-selectable optical imaging of the focused beam and the super-resolved imaging of the nano-materials and nano-structures. The study on this project is of great value not only on the development of near-field imaging technology, but also on the fundamental research within the area of nano-science.

英文关键词： near-field optics;scanning probe;surface plasmon;super-resolution imaging;coupling