Dependence of anisotropic surface plasmon lifetimes of two-dimensional hole arrays on hole geometry

被引：5
作者：
Hui, K. C. [1 ]
Wan, J. T. K. [2 ]
Xu, J. B. [1 ]
Ong, H. C. [2 ]
机构：
[1] Chinese Univ Hong Kong, Dept Elect Engn, Shatin, Hong Kong, Peoples R China
[2] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 06期
关键词：
biosensors; gold; reflectivity; surface plasmon resonance; THIN METAL-FILMS; TRANSMISSION; NANOHOLES;
D O I：
10.1063/1.3205121
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The dependences of surface plasmon lifetimes of two-dimensional Au hole arrays on aspect ratio, hole length, and depth have been studied by angle-dependent reflectivity. Long lifetimes can be obtained from the arrays by reducing the hole length and depth and increasing the aspect ratio. In addition, our results can be qualitatively discussed under the framework of coupled-charge model, indicating the interaction between holes can lead to an increase of surface plasmon lifetime. We believe such interaction can find applications in biosensing such as surface plasmon resonance spectroscopy.
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页数：3
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