Resolution Enhancement in Surface Plasmon Resonance Sensor Based on Waveguide Coupled Mode by Combining a Bimetallic Approach
- Authors
- Lee, Kyeong-Seok; Son, Ju Myeong; Jeong, Dae-Yong; Lee, Taek Sung; Kim, Won Mok
- Issue Date
- 2010-12
- Publisher
- MDPI
- Citation
- SENSORS, v.10, no.12, pp.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.
- Keywords
- SENSITIVITY; BIOSENSORS; SENSITIVITY; BIOSENSORS; waveguide coupled surface plasmon resonance; bimetallic approach; high resolution SPR sensor
- ISSN
- 1424-8220
- URI
- https://pubs.kist.re.kr/handle/201004/130868
- DOI
- 10.3390/s101211390
- Appears in Collections:
- KIST Article > 2010
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