Highly sensitive and wide-dynamic-range liquid-prism surface plasmon resonance refractive index sensor based on the phase and angular interrogations  

作　　者：兰国强 刘书钢 张学如 王玉晓 宋瑛林 

机构地区：[1]Department of Physics,Harbin Institute of Technology [2]School of Electronic Engineering,Heilongjiang University

出　　处：《Chinese Optics Letters》2016年第2期78-82,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant Nos.11374079,91227113,and 11474078

摘　　要：In this study, a new method utilizing surface plasmon resonance （SPR） sensing technology based on the phase and angular interrogations for measuring the refractive index of a liquid prism is presented. An orthogonal sam- ple box that combined the functions of a prism, cell box, and mirror is adopted to simplify the system and provide the convenience to implement the phase and angular interrogations. The angular interrogation is achieved by the motorized rotation stage with the new sample box, and the phase interrogation is achieved by the linear polari- zation interferometry between the s- and p-polarization components. The amplitude reflectivity and the phase angle, which are the functions of the incident angle, are obtained by the reflection intensity and the interference intensity of the lights directly. A sensitivity of 7.5 × 10^-7 refractive index unit （RIU）/0.1° and a dynamic range of 0.5 RIU are obtained experimentally and theoretically.In this study, a new method utilizing surface plasmon resonance （SPR） sensing technology based on the phase and angular interrogations for measuring the refractive index of a liquid prism is presented. An orthogonal sam- ple box that combined the functions of a prism, cell box, and mirror is adopted to simplify the system and provide the convenience to implement the phase and angular interrogations. The angular interrogation is achieved by the motorized rotation stage with the new sample box, and the phase interrogation is achieved by the linear polari- zation interferometry between the s- and p-polarization components. The amplitude reflectivity and the phase angle, which are the functions of the incident angle, are obtained by the reflection intensity and the interference intensity of the lights directly. A sensitivity of 7.5 × 10^-7 refractive index unit （RIU）/0.1° and a dynamic range of 0.5 RIU are obtained experimentally and theoretically.

关 键 词：Orthogonal functions PLASMONS Polarization PRISMS Refractive index REFRACTOMETERS 

分 类 号：O53[理学—等离子体物理]