Title :
Sensitive Surface Plasmon Resonance biosensor based on a photonic crystal and bimetallic configuration
Author :
Fang Wang ; Chaoying Chen ; Peiling Mao ; Yunhan Luo ; Xiaolong Chen ; Junbin Fang ; Shuihua Peng ; Jun Zhang ; Jieyuan Tang ; Huihui Lu ; Zhe Chen ; Jianhui Yu
Author_Institution :
Key Lab. of Optoelectron. Inf. & Sensing Technol. of Guangdong Higher Educ. Inst., Jinan Univ., Guangzhou, China
Abstract :
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.
Keywords :
biosensors; gold; numerical analysis; photonic crystals; silver; surface plasmon resonance; Ag-Au; Ag-Au bimetallic configuration; PC-SPR sensor; PC-bimetallic configuration; high-sensitive photonic crystal surface plasmon resonance sensor; numerical analysis; Biosensors; Gold; Optical surface waves; Photonic crystals; Plasmons; Reflectivity; Silver; FOM; Refractive index; Surface Plasmon Resonance; bimetallic configuration; full-width at half-maximum; photonic crystal; reflectance;
Conference_Titel :
Numerical Simulation of Optoelectronic Devices (NUSOD), 2014 14th International Conference on
Conference_Location :
Palma de Mallorca
Print_ISBN :
978-1-4799-3681-6
DOI :
10.1109/NUSOD.2014.6935384
