Tailoring the sensing capabilities of nanohole arrays in gold films with Rayleigh anomaly-surface plasmon polaritons

被引：169

作者：

McMahon, Jeffrey M. ^{[2
]}

Henzie, Joel ^{[2
]}

Odom, Teri W. ^{[2
]}

Schatz, George C. ^{[2
]}

Gray, Stephen K. ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

来源：

OPTICS EXPRESS | 2007年 / 15卷 / 26期

关键词：

D O I：

10.1364/OE.15.018119

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Surface plasmon polaritons (SPPs) and diffraction effects such as Rayleigh anomalies (RAs) play key roles in the transmission of light through periodic subwavelength hole arrays in metal films. Using a combination of theory and experiment we show how refractive index ( RI) sensitive transmission features arise from hole arrays in thin gold films. We show that large transmission amplitude changes occur over a narrow range of RI values due to coupling between RAs and SPPs on opposite sides of the metal film. Furthermore, we show how to predict, on the basis of a relatively simple analysis, the periodicity and other system parameters that should be used to achieve this "RA-SPP" effect for any desired RI range. (c) 2007 Optical Society of America.

引用

页码：18119 / 18129

页数：11

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