Resolution Enhancement in Surface Plasmon Resonance Sensor Based on Waveguide Coupled Mode by Combining a Bimetallic Approach

Title
Resolution Enhancement in Surface Plasmon Resonance Sensor Based on Waveguide Coupled Mode by Combining a Bimetallic Approach
Authors
이경석손주명정대용이택성김원목
Keywords
Surface Plasmon Resonance Sensor; Waveguide coupled mode; bimetallic approach; high resolution SPR sensor
Issue Date
2010-12
Publisher
Sensors
Citation
VOL 10, NO 12, 11390-11399
Abstract
In this study, we present and demonstrate a new route to a great enhancement in resolution of surface plasmon resonance sensors. Basically, our approach combines a waveguide coupled plasmonic mode and a kind of Au/Ag bimetallic enhancement concept. Theoretical modeling was carried out by solving Fresnel equations for the multilayer stack of prism/Ag inner-metal layer/dielectric waveguide/Au outer-metal layer. The inner Ag layer couples incident light to a guided wave and makes more fields effectively concentrated on the outer Au surface. A substantial enhancement in resolution was experimentally verified for the model stack using a ZnS-SiO2 waveguide layer.
URI
http://pubs.kist.re.kr/handle/201004/39211
ISSN
1424-8220
Appears in Collections:
KIST Publication > Article
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