表面等离子激元在纳米尺度上控制电磁波特性方面具有出色的能力，而且它已经被广泛应用于超材料、生物传感器、激光、非线性光学和光伏器件等领域中。纳米结构的谐振响应可以简单地通过几何结构来控制。尤其是在色彩显示领域，由纳米结构组成的的像素单元更稳定、尺寸更小，大有取代传统显色材料之势。在本项目中，通过研究周期结构中高阶表面等离激元的激发和检测，以及多纳米结构系统中局域表面等离子激元谐振模式间的耦合效应，我们志在实现基于表面等离子体效应的更灵活多变的色彩单元，并将它们应用于信息加密和防伪标签等领域中。我们相信，通过揭示谐振模式背后的物理机制和功能性展示，我们的研究工作也将为表面等离子激元在其他光学和光电器件中的应用开拓出一条更广阔的道路。

Plasmonic resonances of nanostructures possess great capabilities to engineer electromagnetic wave at the nanoscale, which have been applied to various areas, such as metamaterials, biosensing, lasing, nonlinear optics and photovoltaic devices. Especially, nanostructures, whose resonance spectrum of can be readily tailored by geometric dimensions, are promising to replace traditional color display pixels due to their stability and smaller sizes. In this project, through investigating the excitation and detection of high order surface plasmon polariton (SPP) modes on periodic structures and coupling effect of localized surface plasmon resonance (LSPR) of multiple-nanostructure systems, we aim to develop more versatile color prints based on plasmonic nanostructures for applications to information encryption and anti-counterfeiting labels. With the success of this project, we believe the unveiled underlying mechanisms and functionality demonstrations will also pave a broader avenue to other optical and photoelectric devices.