Effect of resonant localized plasmon coupling on the sensitivity enhancement of nanowire-based surface plasmon resonance biosensors

被引：62

作者：

Kim, Donghyun ^{[1
]}

机构：

[1] Yonsei Univ, Sch Elect & Elect Engn, Biophoton Engn Lab, Seoul 120749, South Korea

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2006年 / 23卷 / 09期

关键词：

D O I：

10.1364/JOSAA.23.002307

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A nanowire-based surface plasmon resonance (SPR) is investigated as a structure that offers improved sensor performance. The results calculated by rigorous coupled-wave analysis on a model using a hexanedithiol self-assembled monolayer (SAM) indicate that the resonant coupling between localized surface plasmons (LSPs) of nanowires affects the sensitivity enhancement substantially, while the LSP resonance in a single nanowire also contributes. SPR characteristics change significantly by applying a SAM, which can give rise to zero sensitivity for a given SAM. The results suggest that a properly designed nanowire-based SPR biosensor can enhance sensitivity by an order of magnitude with reasonable detection properties. (c) 2006 Optical Society of America.

引用

页码：2307 / 2314

页数：8

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