中国激光, 2011, 38 (s1): s114004, 网络出版: 2011-10-28
对膜厚不敏感的光谱表面等离子体共振传感器 
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Spectral Surface Plasmon Resonance Sensor Insensitive to the Thickness of Metal Films
光谱学 表面等离子体共振 金属膜厚 偏振干涉 光谱型 spectrosopy surface plasmon resonance film thickness polarization interferometry spectral
摘要
表面等离子体共振(SPR)传感技术具有很高的折射率分辨率。但是其折射率分辨率对金属膜厚度非常敏感，影响了SPR传感器的适用性。使用一种叫做“偏振干涉”的技术，来减小光谱型SPR传感器的折射率对金膜厚度的敏感性。实验结果表面，偏振干涉能够降低SPR光谱的最小值，提高使用非最佳金属膜的SPR传感器的折射率分辨率。金膜厚度在28.16~54.38 nm范围内变化时，系统的折射率分辨率达到3.9×10-7~8.1×10-7RIU(折射率单位)。
Abstract
Surface plasmon resonance (SPR) sensing technique has a very high refractive-index (RI) resolution. However, this RI resolution is very sensitive to the thickness of metal films, deteriorating the adaptability of SPR sensors. The sensitivity of RI resolution of a spectral SPR sensor to the thickness of metal films is reduced by a technique called "polarization interferometry (PI)". That the PI technique could reduce the minimum of the SPR spectrum is experimentally demonstrated, and the RI resolution of the sensors with non-optimal metal films is improved. RI resolution ranging from 3.9×10-7 to 8.1×10-7 refractive index unit (RIU) is achieved with the thickness of the Au film ranging from 28.16 to 54.38 nm.
刘乐, 刘智毅, 陈相亮, 马绥华, 杜婵, 何永红, 郭继华. 对膜厚不敏感的光谱表面等离子体共振传感器[J]. 中国激光, 2011, 38(s1): s114004. Liu Le, Liu Zhiyi, Chen Xiangliang, Ma Suihua, Du Chan, He Yonghong, Guo Jihua. Spectral Surface Plasmon Resonance Sensor Insensitive to the Thickness of Metal Films[J]. Chinese Journal of Lasers, 2011, 38(s1): s114004.
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