Optical phase-shift detection of surface plasmon resonance

被引:99
作者
Shen, SA [1 ]
Liu, T [1 ]
Guo, JH [1 ]
机构
[1] Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
来源
APPLIED OPTICS | 1998年 / 37卷 / 10期
关键词
D O I
10.1364/AO.37.001747
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A heterodyne optical measurement system for studying the phase shift of surface plasmon resonance (SPR) is presented. The system utilizes a frequency-stabilized Zeeman laser as a detection light source and is suitable for real-time phase measurement in SPR-sensing applications. The phase shift in an angular dispersion SPR excitation setup was measured ranging from +180 degrees to -120 degrees around the SPR excitation region. The experimental results fit well with the theoretical analysis. Compared with the reflection coefficient variation that is widely investigated in SPR studies, phase shift is estimated to provide a higher sensitivity to sensor systems and more information about the resonance phenomenon. (C) 1998 Optical Society of America.
引用
收藏
页码:1747 / 1751
页数:5
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