微介质锥、纳金属锥和纳金属锥孔中的光场调控

项目名称： 微介质锥、纳金属锥和纳金属锥孔中的光场调控

项目编号： No.11274186

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： 匡登峰

作者单位： 南开大学

项目金额： 80万元

中文摘要： 本项目利用微介质锥产生的微聚焦光束照射纳金属锥，既突破了微介质锥的衍射极限，又解决了纳金属锥入口小的局限，尽最大可能地收集入射光能，并有效地转化为表面等离激元，以实现更高的纳米聚焦。通过理论模拟计算、微纳米加工和光学实验，揭示微纳米锥形复合结构中从微聚焦到纳米聚焦过程光动量和能量的转变，深入研究等离激元的激发和演变，明晰其在纳米聚焦中的作用机理。利用微介质锥和纳金属锥结合方式、材料和结构参数等多参量的联合变换，可望实现三维光场的调控和局域增强。在此基础上设计和制作微介质锥和纳金属锥复合的新型原子力显微镜探针，并利用纳金属锥孔作为生物分子和纳米颗粒等样品的基底，构建更高空间分辨和高灵敏的针尖增强拉曼光谱系统。从而为发展具有自主知识产权的高效纳米光学天线、纳米探针和纳米光学回路奠定坚实的理论和实验基础，在纳米光刻、纳米传感、纳米成像以及新一代光学信息处理和亚波长光通信等诸多领域有重要应用价值。

中文关键词： 聚焦矢量光场调控；微介质锥；纳金属锥；曲线光束；表面等离激元

英文摘要： The micro-focusing beams generated by micro dielectric cones are presented to illuminate nano metallic cones in this project, in order not only to break the diffraction limit of micro dielectric cones, but also to overcome the problem of the tiny entrance aperture of nano metallic cones. Thus, much more light can be firstly collected by the micro dielectric cones and then efficiently converted to surface plasmon polaritons in the nano metallic cones for achieving final stronger nano-focusing. Theoretical modeling and simulations, micro and nano fabrications, and optical experiments will be performed in detail for micro dielectric cones, nano metallic cones, and nano metallic conic voids. The light momentum and energy transfer will be revealed during the process from micro-focusing to nano-focusing in the combined configuration consisting of micro dielectric cones and nano metallic cones. The excitation and evolution of plasmon polaritons will be further studied to clarify the role that they play in nano-focusing. Three dimensional optical fields tuning, controlling and localized enhancement are expected to be effectively carried out by the joint transforms of the combining configurations of micro dielectric cones and nano metallic cones, their materials and structure parameters. Based on the above achievements,

英文关键词： focused vector optical field tuning；micro dielectric cone；nano metallic cone；curved beam；surface plasmon polariton