Sensitive Surface Plasmon Resonance biosensor based on a photonic crystal and bimetallic configuration

In this paper, we present and numerically demonstrate a highly sensitive photonic crystal (PC) Surface Plasmon Resonance (SPR) sensor. This proposed sensor consists of an Ag-Au bimetallic configuration that integrates the better evanescent field enhancement of silver, the higher resolution in the re...

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Bibliographic Details
Main Authors: Fang Wang, Chaoying Chen, Peiling Mao, Yunhan Luo, Xiaolong Chen, Junbin Fang, Shuihua Peng, Jun Zhang, Jieyuan Tang, Huihui Lu, Zhe Chen, Jianhui Yu
Format: Conference Proceeding
Language:English
Subjects:
bimetallic configuration
Biosensors
FOM
full-width at half-maximum
Gold
Optical surface waves
photonic crystal
Photonic crystals
Plasmons
reflectance
Reflectivity
Refractive index
Silver
Surface Plasmon Resonance
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Summary:In this paper, we present and numerically demonstrate a highly sensitive photonic crystal (PC) Surface Plasmon Resonance (SPR) sensor. This proposed sensor consists of an Ag-Au bimetallic configuration that integrates the better evanescent field enhancement of silver, the higher resolution in the reflectivity minimum of silver, and the high chemical of gold. In comparison to most convenient SPR sensors which use single gold films, this PC-bimetallic configuration is shown theoretically to possess a narrower resonance width, smaller minimum reflectance and higher sensitivity, which makes it a much better choice to be employed for SPR biosensing applications.
ISSN:2158-3234
DOI:10.1109/NUSOD.2014.6935384