项目名称: Ag纳米颗粒链的制备及其基于表面等离激元的亚波长尺度下光传输特性研究
项目编号: No.11204307
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 物理学I
项目作者: 许少辉
作者单位: 中国科学院合肥物质科学研究院
项目金额: 28万元
中文摘要: 基于表面等离激元技术的光学器件可以克服传统光学器件受衍射极限限制的缺点,实现在纳米尺寸下对光的传输和操控。一维贵金属纳米颗粒链作为激发和控制表面等离激元的结构之一,由于其结构设计的自由性以及能够排成复杂的形状,有望实现真正意义上的波导型纳米器件。理论研究表明贵金属颗粒链光传输性能可通过优化其几何参数以及引入光增益介质来调控和改善。本项目中,在金属超晶格纳米线基础上,通过对其进行成分选择性去除,制备一维Ag纳米颗粒链并实现对其几何参数包括颗粒尺寸、长径比及颗粒间距的调控;通过对其进行成分选择性氧化,将增益介质引入金属颗粒链结构中。系统研究几何参数和光增益介质对共振波长和传输距离的影响,总结规律,建立光传输性能随几何参数和光增益介质的变化关系;并以此为指导优化Ag颗粒链参数设计,实现高效率光传输。此项研究将为理论研究提供系统的实验依据,并将为后期纳米光学器件的设计与制作提供一定的基础与指导。
中文关键词: 贵金属颗粒链;可控制备;几何参数;光传输;增益介质
英文摘要: Optical devices based on surface plasmon-polaritons technology can overcome the shortcoming of converntional optical devices which restricted by the diffraction limit, and transimit and munipulate the light in nanometer-size. One-deimensional nobel metal nanoparticle chain as a structure to simulate and control the surface plasmon-polaritons, due to some degrees of freedom in design and arrangment in a more complex shape,is expected to achieve a true sense of waveguide-type nano device. Theoretical studies indicated that, the optical transmission properties of the nobel metal particle chain can be controlled and improved by optimizing the geometric parameters and introducing the optical gain medium. In this project, we firstly fabricate the metallic superlattice nanowires, and then selectively remove one component to acquire the Ag nanoparticle chain with adjustable geometric parameters containing particle size, aspect ratio and particle diatance; introduce the optical gain medium into the Ag nanoparticle chain by a selective oxidation of the constituent of superlattice nanowires. We Systematically study the impact of the geometric parameters and optical gain medium on the optical transmission performance containing resonant wavelength and tramission length,summarize up the law and establish the relationship of
英文关键词: precious metal nanoparticles chain;controllable fabrication;geometric parameters;light transmission;gain medium