A novel biosensor with enhanced sensitivity based on grating coupled double-layered porous silicon waveguide

The enhanced sensitivity of a guided mode biosensor is analyzed by employing double-layered porous silicon grating structures. The grating-coupled waveguide structure consists of two porous silicon grating layers with different refractive indices. Simulations are carried out by changing the refracti...

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Bibliographic Details
Published inOptoelectronics letters Vol. 8; no. 3; pp. 179 - 181
Main Author 吕小毅 莫家庆 张红燕 钟福如 贾振红
Format Journal Article
LanguageEnglish
Published Heidelberg Tianjin University of Technology 01.05.2012
Subjects
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
光栅耦合
变折射率
基础
多孔硅
灵敏度分析
生物传感器
硅波导
高灵敏度
Refractive Index
Waveguide Layer
Couple Waveguide
Porous Silicon
Rigorous Couple Wave Analysis
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ISSN1673-1905
1993-5013
DOI10.1007/s11801-012-1195-z

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Summary:The enhanced sensitivity of a guided mode biosensor is analyzed by employing double-layered porous silicon grating structures. The grating-coupled waveguide structure consists of two porous silicon grating layers with different refractive indices. Simulations are carried out by changing the refractive index, which is due to the binding of biological molecules on the porous silicon pore can increase the refractive index of porous silicon. The numerical results show that this novel guided mode biosensor with a double-layered grating can provide not only a very high sensitivity but also a better reflectivity characteristic.
Bibliography:12-1370/TN
LU Xiao-yi , MO Jia-qing, ZHANG Hong-yan , ZHONG Fu-ru , JIA Zhen-hong（1. Postdoctoral Station of Computer Science and Technology, Xinjiang University, Urumqi 830046, China; 2. Colleges of Information Science and Engineering, Xinjiang University, Urumqi 830046, China; 3. School of Electronic and Information Engineering, Xi ＇an Jiaotong University, Xi ＇an 710049, China; 4. School of Physics, Xinjiang University, Urumqi 830046, China）
The enhanced sensitivity of a guided mode biosensor is analyzed by employing double-layered porous silicon grating structures. The grating-coupled waveguide structure consists of two porous silicon grating layers with different refractive indices. Simulations are carried out by changing the refractive index, which is due to the binding of biological molecules on the porous silicon pore can increase the refractive index of porous silicon. The numerical results show that this novel guided mode biosensor with a double-layered grating can provide not only a very high sensitivity but also a better reflectivity characteristic.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-012-1195-z