標題: High-sensitivity sensor based on surface plasmon resonance and heterodyne interferometry
作者: Wu, CM
Jian, ZC
Joe, SF
Chang, LB
交大名義發表
National Chiao Tung University
關鍵字: surface plasmon resonance;sensors;interferometers;waveguides;phase measurement
公開日期: 1-Jul-2003
摘要: A common-path, heterodyne interferometric system for investigation of the phase variations under surface plasmon resonance (SPR) is presented. With the combination of SPR and total internal reflection (TIR), the system has the merits of avoiding direction change in the output light and increasing sensitivity. The system utilizes a pair of orthogonally linearly polarized beams with heterodyne frequency of 60 kHz as the light source. Because the two beams are perfectly collinear, the noises resulting from the ambient conditions are greatly reduced. Compared to reflectivity variation measurement, which is widely used in traditional SPR, the phase variation measurement using commonpath, heterodyne techniques is approximately an order of magnitude higher in sensitivity and thus can be used as a high-sensitivity-demanded biosensor. (C) 2003 Elsevier Science B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/S0925-4005(03)00157-6
http://hdl.handle.net/11536/27725
ISSN: 0925-4005
DOI: 10.1016/S0925-4005(03)00157-6
期刊: SENSORS AND ACTUATORS B-CHEMICAL
Volume: 92
Issue: 1-2
起始頁: 133
結束頁: 136
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