Ag纳米粒子点阵的表面等离激元共振特性调控  

Tuning surface plasmon resonance by controlling silver nanoparticle array

作　　者：高俊[1,2,3] 韩民[2,3] 

机构地区：[1]常熟理工学院物理与电子工程学院,江苏常熟215500 [2]南京大学固体与微结构物理国家重点实验室 [3]南京大学材料科学与工程系,江苏南京210093

出　　处：《量子电子学报》2015年第2期222-227,共6页Chinese Journal of Quantum Electronics

基　　金：江苏省高校科研产业化推广计划(JH10-2)资助

摘　　要：通过纳米粒子束流气相沉积方法在衬底表面沉积稠密银纳米粒子点阵。通过对纳米粒子覆盖率的精细控制与纳米粒子点阵消光谱的实时监测,实现了其表面等离激元共振峰频率的系统调控。随着Ag纳米粒子密度的增加,点阵的表面等离激元共振波长发生红移,可逐步由小于400 nm增大到570nm以上。研究发现,表面等离激元共振波长的变化与随纳米粒子沉积量增加而增加的紧密相邻的纳米粒子对的百分数相关。The densive silver nanoparticle array was deposited by using systemic nanometer particle beam gas phase deposition method.Through real time monitoring the extinction spectrum of the nanoparticles and the fine control on the nanoparticle array coverage,the systemic control of surface plasmon resonance frequency was realized.With the increasing of the density of Ag nanoparticles,the redshift of the surface plasmon resonance wavelength occurred from less than 400 nm to more than 570 nm.It was found that change of surface plasmon resonance wavelength is related to the percent of closely linked pairs among the deposited nanoparticles.

关 键 词：表面光学 表面等离激元共振 红移 Ag团簇 近场耦合 

分 类 号：O436.1[机械工程—光学工程]