Sensors 2010, 10(12), 11390-11399; doi:10.3390/s101211390
Article

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

1 Electronic Materials Center, Korea Institute of Science and Technology, Seoul 136-791, Korea 2 Department of Materials Science and Engineering, Myongji University, Yongin 443-749, Korea
* Author to whom correspondence should be addressed.
Received: 20 August 2010; in revised form: 23 November 2010 / Accepted: 7 December 2010 / Published: 13 December 2010
(This article belongs to the Section Biosensors)
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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.
Keywords: waveguide coupled surface plasmon resonance; bimetallic approach; high resolution SPR sensor

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MDPI and ACS Style

Lee, K.-S.; Son, J.M.; Jeong, D.-Y.; Lee, T.S.; Kim, W.M. Resolution Enhancement in Surface Plasmon Resonance Sensor Based on Waveguide Coupled Mode by Combining a Bimetallic Approach. Sensors 2010, 10, 11390-11399.

AMA Style

Lee K-S, Son JM, Jeong D-Y, Lee TS, Kim WM. Resolution Enhancement in Surface Plasmon Resonance Sensor Based on Waveguide Coupled Mode by Combining a Bimetallic Approach. Sensors. 2010; 10(12):11390-11399.

Chicago/Turabian Style

Lee, Kyeong-Seok; Son, Ju Myeong; Jeong, Dae-Yong; Lee, Taek Sung; Kim, Won Mok. 2010. "Resolution Enhancement in Surface Plasmon Resonance Sensor Based on Waveguide Coupled Mode by Combining a Bimetallic Approach." Sensors 10, no. 12: 11390-11399.

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