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本文从理论和实验两方面探讨了具有微结构的金属纳米线系统中表面等离激元传播规律和分光特性.我们由麦克斯韦方程组出发,利用严格耦合波近似和有限元差分等方法首先从理论上给出了金属纳米线系统中等离激元的色散关系和能带特征,然后基于微结构的银纳米线及其等离激元能带结构,设计并制备出等离激元分光原型器件,实验展示其将不同频率的光在微小空间分离的特性.该研究结果是我们前期相关工作的延续和补充,可应用于构造多功能集成的光子芯片和新型亚波长光电材料和器件.
In this paper, we discuss the propagation and spectroscopic properties of surface plasmon in a microstructure-based metal nanowire system from two aspects of theory and experiment.We start from the Maxwell equations, and use the method of strict coupled-wave approximation The dispersion relation and band characteristics of plasmonic in metal nanowire system are given. Based on the microstructure of silver nanowire and plasmon band structure, a prototype plasmon separation device is designed and prepared. Experiments show that the light of different frequencies in a small space separation characteristics.The results of our previous work is continuation and complementarity, can be applied to the construction of multi-function integrated photonic chip and new sub-wavelength optoelectronic materials and devices.