LSPR spectral properties of Au nano-ring arrays and single Au nanoparticles  被引量:1

LSPR spectral properties of Au nano-ring arrays and single Au nanoparticles

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作  者:MA Jun-xian TAN Rui-hu FANG Yu ZHENG Da-wei LUO Xian-gang 

机构地区:[1]Advanced Technology Research Center, Shenzhen University, Shenzhen 518050, China

出  处:《中国光学与应用光学》2010年第1期75-78,共4页Chinese Optics and Applied Optics Abstracts

基  金:supported by the Major State Basic Research and Development Program(973 Program) (2006CB302900) ; National Nature Science Foundation of China(60772026).

摘  要:In this paper, we simulate Localized Surface Plasmon Resonance(LSPR) absorption of periodic Au nano-ring arrays and single Au nanoparticles using the Finite Difference Time Domain(FDTD) method. We choose input plane waves of different wavelengths and discuss the relation between the absorption peak of the Au array and the variable external dielectric constants. It is found that the sensitivity of these sensors based on LSPR is improved compared to the common sensors and the enhancement is caused by the periodical structure. We also investigate the spectrum characteristic of a single Au nanoparticle and discuss the relation between the absorption peak and the size of the nanoparticle.In this paper, we simulate Localized Surface Plasmon Resonance(LSPR) absorption of periodic Au nano-ring arrays and single Au nanopal,ticles using the Finite Difference Time Domain (FDTD) method. We choose input plane waves of different wavelengths and discuss the relation between the absorption peak of the Au array and the variable external dielectric constants. It is found that the sensitivity of these sensors based on LSPR is improved compared to the common sensors and the enhancement is caused by the periodical structure. We also investigate the spectrum characteristic of a single Au nanoparticle and discuss the relation between the absorption peak and the size of the nanoparticle.

关 键 词:等离子体 平面波 周期性结构 共振 

分 类 号:O53[理学—等离子体物理] TN011[理学—物理]

 

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