一维可变价态过渡金属氧化物纳米结构的近红外表面等离激元研究

项目名称： 一维可变价态过渡金属氧化物纳米结构的近红外表面等离激元研究

项目编号： No.11474364

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： 陈焕君

作者单位： 中山大学

项目金额： 110万元

中文摘要： 一维可变价态过渡金属氧化物纳米结构具有独特的电子能带结构、可调的传导电子浓度以及良好的热稳定性，在充当表面等离激元（SP）载体方面有巨大的潜力。本申请项目将以氧化钨、氧化钼一维纳米结构为代表，深入而系统地研究一维过渡金属氧化物纳米结构的SP特性。研究中拟采用单颗粒光谱测试手段对单根纳米结构的SP远场和近场光学特性进行测试，包括共振峰位、峰宽、远场辐射偏振态、远场辐射强度、SP弛豫动力学、以及纳米结构周围的局域电场分布。基于实验结果，结合第一性原理计算和电磁场数值模拟，发展计算氧化钨、氧化钼一维纳米结构SP特性的方法。我们也将探索利用外加电场和光场对氧化钨、氧化钼纳米结构SP特性进行调控的技术。最后，我们将相关研究拓展至其它一维过渡金属氧化物纳米结构体系，揭示其SP特性的普适规律。本研究对深入理解纳米尺度光与物质相互作用的物理规律具有重要意义，也为开发新型SP载体材料提供理论参考和技术储备。

中文关键词： 表面等离激元；过渡金属氧化物；一维纳米结构；近场光学；纳光子学

英文摘要： Due to their distinct electronic band structures, tunable charge densities, and excellent thermal stability, one dimensional transition metal oxide nanostructures with tunable chemical states have attracted more and more interests and are considered as very promising candidate materials sustaining surface plasmon (SP). In this proposal, we intend to systematically study the plasmonic properties of the one dimensional transistion metal oxide nanostructures. We will mainly focus on one dimensional tungsten oxide nanostructures and molybdenum oxide nanostructures and then extend the study to other representative one dimensional transition metal oxide nanostructures. In our studies, the dependence of various plasmonic properties, including the resonance frequency, the plasmon linewidth, the far-field emission polarization, the far-field emission intensity, the plasmon dynamics, and the plasmon induced near-field distributions, on the charge density as well as the shape and size of the nanostructures will be cultivated using single-particle spectroscopy measurements. On the basis of the experimental results, algorithms combining first-principle calculations and numerical electromagnetic simulations will be developed to calculate the plasmonic properties of the nanowires and reveal the underlying physics. Finally, electric and optical field will then be employed to actively tailor the plasmon properties of the nanowires by taking advantages of their electrochromic and photochromic effects. We strongly believe that the success of this proposal will not only further our understanding on the plasmonics as well as light-matter interactions at the nanoscale, but also pave the way for the design and develop of novle plasmonic materials.

英文关键词： surface plasmon;transition metal oxide;one dimensional nanostructure;near-field optics;nanophotonics