1. Resolution enhancement in surface plasmon resonance sensor based on waveguide coupled mode by combining a bimetallic approach.
- Author
-
Lee KS, Son JM, Jeong DY, Lee TS, and Kim WM
- Subjects
- Image Enhancement methods, Light, Models, Biological, Models, Theoretical, Refractometry instrumentation, Refractometry methods, Surface Plasmon Resonance methods, Time Factors, Biosensing Techniques instrumentation, Gold chemistry, Image Enhancement instrumentation, Silver chemistry, Surface Plasmon Resonance instrumentation
- 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.
- Published
- 2010
- Full Text
- View/download PDF