Enhanced resolution of surface plasmon resonance sensor by using a coupled mode through bimetallic approach

Title
Enhanced resolution of surface plasmon resonance sensor by using a coupled mode through bimetallic approach
Authors
손주명정대용조성훈이택성김원목이경석
Keywords
surface plasmon resonance sensor; waveguide coupled mode; bimetallic approach; resolution
Issue Date
2009-12
Publisher
International conference on advanced materials and devices 2009
Citation
, 214-214
Abstract
For early diagnosis of diseases and pathogen infection and rapid environmental monitoring, further enhancement in resolution of surface plasmon resonance (SPR) sensor is required to detect low-molecular-weight analytes down to a hundreds of Daltons and a trace level concentration of tens of femtomoles. It has been known that the conventional SPR sensor using a Au single layer has a limited resolution. Various configurations have been proposed and explored mainly focused on the way of sharpening the SPR reflectivity curve. In this study, we present a high resolution SPR sensor using a coupled mode between the surface plasmon and guided wave, and demonstrate that the resolution can be further enhanced by combining the bimetallic approach. Theoretical modeling has been carried out by solving Fresnel equations for a multilayer stack of metal-insulator-metal geometry and experimentally verified by analyzing the response to a sucrose solution with different concentration. "Grant from Center for Nanostructured Materials Technology (2009K000459)"
URI
http://pubs.kist.re.kr/handle/201004/36987
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KIST Publication > Conference Paper
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