Dual-mode surface-plasmon-resonance sensors using angular interrogation

被引：81

作者：

Guo, Jing ^{[1
]}

Keathley, P. Donald ^{[1
]}

Hastings, J. T. ^{[1
]}

机构：

[1] Univ Kentucky, Dept Elect & Comp Engn, Lexington, KY 40506 USA

来源：

OPTICS LETTERS | 2008年 / 33卷 / 05期

关键词：

D O I：

10.1364/OL.33.000512

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Surface-plasmon-resonance (SPR) sensors are widely used in biological, chemical, medical, and environmental sensing. SPR sensors supporting two surface-plasmon modes can differentiate surface binding interactions from bulk index changes at a single sensing location. We present a new approach to dual-mode SPR sensing that offers improved differentiation between surface and bulk effects. By using an angular interrogation, both long- and short-range surface plasmons are simultaneously excited at the same location and wavelength but at different angles. Initial experiments indicate that angular interrogation offers at least a factor of 3.6 improvement in surface and bulk cross-sensitivity compared to wavelength-interrogated dual-mode SPR sensors. (c) 2008 Optical Society of America.

引用

页码：512 / 514

页数：3

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