金纳米球壳结构局域表面等离子体共振调谐特性  

Tunable Localized Surface Plasmon Resonance of Gold Nanoshell Particle

作　　者：张兴坊[1] 张腊梅[1] 范群芳[1] 廖艳林[1] 陈晓东[1] 毛庆和[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所安徽省光子器件与材料重点实验室,安徽合肥230031

出　　处：《中国激光》2011年第9期204-208,共5页Chinese Journal of Lasers

基　　金：国家973计划(2007CB936603);国家863计划(2011AA030203)资助课题

摘　　要：理论研究了金纳米球壳结构局域表面等离子体共振(LSPR)的调谐特性。结果表明,对于固定内径的球壳结构,利用杂化效应使得球壳结构可通过改变其厚度实现LSPR峰位的调控,并可保持较窄的谱宽;而对于不同内径的球壳,在LSPR调控过程中,随壳层厚度与球壳内半径比值的减小,吸收光谱在消光光谱中所占比例增大。不仅如此,利用杂化效应进行偶极峰位调控时所能获得的峰位调控范围与球壳内径有关,内径越大,所能获得的偶极峰位调控范围越大。Tunable characteristics of the localized surface plasmon resonance （LSPR） peak of gold nanoshells are investigated numerically with Mie theory. The results show that, for a nanoshell with fixed inner radius, the LSPR peak of gold nanoshell may be controlled by changing the thickness of the shell to adjust the strength of the hybridization effect which makes the LSPR peak red-shift. As the ratio of the nanoshell thickness to the nanoshell inner radius decreases, the absorption component in whole extinction spectra for nanoshells with different inner radii all increases. In addition, when the hybridization effect is used to adjust the LSPR dipole peak position, the available maximum wavelength scope is determined by the nanoshell inner radius. The larger the inner radius is, the wider the available maximum wavelength scope is.

关 键 词：表面光学 纳米球壳 局域表面等离子体共振 杂化效应 调谐 

分 类 号：O436[机械工程—光学工程]