Fiber-optic waveguide coupled surface plasmon resonance sensor

A novel approach to give an excellent tunability and self-referencing capability was presented by applying a concept of waveguide coupled surface plasmon resonance mode to a fiber-optic sensor. The presence of dielectric waveguide sandwiched between two metal layers made it possible to precisely tun...

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Bibliographic Details
Published in:Optics express 2012-09, Vol.20 (19), p.21729-21738
Main Authors: Ahn, Jae Heon, Seong, Tae Yeon, Kim, Won Mok, Lee, Taek Sung, Kim, Inho, Lee, Kyeong-Seok
Format: Article
Language:English
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Summary:A novel approach to give an excellent tunability and self-referencing capability was presented by applying a concept of waveguide coupled surface plasmon resonance mode to a fiber-optic sensor. The presence of dielectric waveguide sandwiched between two metal layers made it possible to precisely tune the resonance wavelength in a broad range from visible to infrared region and to generate multiple modes which may be selectively used for suitable applications. Our approach also verified the potential capability of self-referencing based on a remarkable difference in sensitivity between the plasmonic and waveguide modes excited by p- and s-polarized lights, respectively, without using an additional reference channel. Experimental measurement carried out on sucrose solutions with varying concentration demonstrated the feasibility of our approach.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.021729