Tailoring the parameters of nanohole arrays in gold films for sensing applications

被引：8
|
作者：
Schatz, George C. [1 ]
McMahon, Jeffrey M. [1 ,2 ,3 ]
Gray, Stephen K. [2 ,3 ]
机构：
[1] Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA
[2] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA
[3] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA
来源：
PLASMONICS: METALLIC NANOSTRUCTURES AND THEIR OPTICAL PROPERTIES V | 2007年 / 6641卷
基金：
美国国家科学基金会;
关键词：
surface plasmons; Wood anomalies; extraordinary optical transmission; periodic hole arrays;
D O I：
10.1117/12.731368
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Subwavelength hole arrays in metal films have the potential to exhibit narrow and high refractive index (RI) sensitive transmission features. We have previously demonstrated that such features can arise from the coupling between Wood anomalies (WAs) and surface Plasmon polaritons (SPPs) on opposite sides of the metal film, the "WA-SPP" effect. Rigorous coupled-wave analysis (RCWA) calculations on a 2D model, which are shown to give WA-SPP features very similar to that of 3D Finite-Difference Time-Domain (FDTD) calculations, are performed to determine how system parameters influence the strength of the WA-SPP effect. Herein we show that the optimum values for the film thickness and hole diameter are 45 and 175 nm, respectively.
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收藏
页数：8
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