A Novel Method for Heightening Sensitivity of Prism Coupler-Based SPR Sensor

张志伟; 温廷敦; 武志芳

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A Novel Method for Heightening Sensitivity of Prism Coupler-Based SPR Sensor

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摘要

We present a novel method for heightening the sensitivity of a prism coupler-based surface plasmon resonance(SPR)sensor.The method is based on the total reflection prism made of BK7 glass combined with the Kretschmann geometry of theattenuated total reflection(ATR)method.Compared to the conventional methods of prism coupler-based SPR,the novel method provides higher sensitivity to the measurement system.Theoretical simulations show that the detection sensitivity to the refractive index(RI)of the sensor based on the novel approach has a strong dependence on the thickness of the metal layer.The RI resolution of the sensor is predicted to be 8×10^(-7)refractive index units(RIU)under the condition of optimum metal film thickness.This novel method can leave out a precision angle rotation device in the angle modulation and it is unnecessary to adjust the acceptance angle of the light detector.The principal advantage of this method over other methods of light intensity modulation based on prism coupler-based SPR is high sensitivity,expediency to measure and application of long distances.

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《中国物理快报：英文版》 |2011年第5期|143-146|共4页
作者
张志伟; 温廷敦; 武志芳;
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作者单位

Key Laboratory of Instrumentation Science and Dynamic Measurement(Ministry of Education);

North University of China;

Taiyuan 030051;

National Key Laboratory for Electronic Measurement Technology;

Taiyuan 030051;

No.33 Research Institute;

China Electronic Technology Group Corporation;

Taiyuan 030006;

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原文格式 PDF
正文语种 chi
中图分类自动化技术及设备;
关键词
refractive; method; angle;

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1. Sensitivity Dependence of Surface Plasmon Resonance Based Sensors on Prism Refractive Index [J] . Wang Guo-ping ,Sugiura Tadao ,Kawata Satoshi . 武汉大学学报：自然科学英文版 . 2002,第1期
2. High sensitivity SPR sensor for liquid phase sample with Ag/PbS/Graphene hybrid nanostructure [J] . Kexiu Dong ,Yanping Ji ,Jiajia Mi . 光电工程 . 2017,第2期
3. High Sensitivity Transmission-Type SPR Sensor by Using Metallic-Dielectric Mixed Gratings [J] . 吴斌 ,王庆康 . 中国物理快报：英文版 . 2008,第5期
4. Synthesis of Ag Nanoparticles By Phytochemical method and Its Application on Electrochemical Sensor for the Detection of Nitrite Ions [A] . NAEEM ULLAH KHAN . 2018

A Novel Method for Heightening Sensitivity of Prism Coupler-Based SPR Sensor

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