Optical Properties of Plasmon Resonances with Ag/SiO2/Ag Multi-Layer Composite Nanoparticles  

作　　者：MA Ye-Wan ZHANG Li-Hua WU Zhao-Wang ZHANG Jie 

机构地区：[1]School of Physics and Electric Engineering, Anqing Teachers College, Anqing 246011

出　　处：《Chinese Physics Letters》2010年第6期107-109,共3页中国物理快报（英文版）

摘　　要：Optical properties of plasmon resonance with Ag/SiO2/Ag multi-layer nanoparticles are studied by numerical simulation based on Green＇s function theory. The results show that compared with single-layer Ag nanoparticles, the multi-layer nanoparticles exhibit several distinctive optical properties, e.g. with increasing the numbers of the multi-layer nanoparticles, the scattering efficiency red shiRs, and the intensity of scattering enhances accordingly. It is interesting to find out that slicing an Ag-layer into multi-layers leads to stronger scattering intensity and more ＂hot spots＂ or regions of stronger field enhancement. This property of plasmon resonance of surface Raman scattering has greatly broadened the application scope of Raman spectroscopy. The study of metal surface plasmon resonance characteristics is critical to the further understanding of surface enhanced Raman scattering as well as its applications.

关 键 词：复合纳米粒子 等离子体共振 光学性能 表面增强拉曼散射 银纳米粒子 格林函数理论 散射强度 共振拉曼散射 

分 类 号：O643.361[理学—物理化学] O437[理学—化学]