Tunable sensitivity phase detection of transmitted-type dual-channel guided-mode resonance sensor based on phase-shift interferometry

This paper reports on a transmitted-type dual-channel guided-mode resonance (GMR) sensor system that uses phase-shifting interferometry (PSI) to achieve tunable phase detection sensitivity. Five interference images are captured for the PSI phase calculation within ∼15  s by using a liquid crystal re...

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Bibliographic Details
Published in:Applied optics (2004) 2016-02, Vol.55 (4), p.903-907
Main Authors: Kuo, Wen-Kai, Syu, Siang-He, Lin, Peng-Zhi, Yu, Hsin Her
Format: Article
Language:English
Subjects:
Analyzers
Biosensing Techniques - instrumentation
Data buses
Giant magnetoresistance sensing devices
Interferometry
Interferometry - instrumentation
Mathematical analysis
Optimization
Printing, Three-Dimensional
Sensors
Webcams
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Description
Summary:This paper reports on a transmitted-type dual-channel guided-mode resonance (GMR) sensor system that uses phase-shifting interferometry (PSI) to achieve tunable phase detection sensitivity. Five interference images are captured for the PSI phase calculation within ∼15  s by using a liquid crystal retarder and a USB web camera. The GMR sensor structure is formed by a nanoimprinting process, and the dual-channel sensor device structure for molding is fabricated using a 3D printer. By changing the rotation angle of the analyzer in front of the camera in the PSI system, the sensor detection sensitivity can be tuned. The proposed system may achieve high throughput as well as high sensitivity. The experimental results show that an optimal detection sensitivity of 6.82×10(-4)  RIU can be achieved.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.55.000903