Research Papers

Phase-detection-sensitivity enhancement of grating-coupled surface plasmon resonance sensor with light incident at nonzero azimuth angle

[+] Author Affiliations
Wen-Kai Kuo

National Formosa University, Institute of Electro-Optical and Material Science, 64 Wenhua Road, Huwei, Yunlin 63208, Taiwan

Chih-Hao Chang

National Formosa University, Institute of Electro-Optical and Material Science, 64 Wenhua Road, Huwei, Yunlin 63208, Taiwan

Chien-Jang Wu

National Taiwan Normal University, Institute of Electro-Optical Science and Technology, 88, Sec. 4, Ting-Zhou Road, Taipei 11677, Taiwan

Hsin-Her Yu

National Formosa University, Department of Biotechnology, 64 Wenhua Road, Huwei, Yunlin 63208, Taiwan

J. Nanophoton. 6(1), 063524 (Oct 31, 2012). doi:10.1117/1.JNP.6.063524
History: Received September 3, 2012; Revised October 11, 2012; Accepted October 12, 2012
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Abstract.  We have numerically and experimentally demonstrated the enhancement of phase detection sensitivity of a grating-coupled surface plasmon resonance (GCSPR) sensor by using incident light at a nonzero azimuth angle. Phase detection measurements were performed using an electro-optic heterodyne interferometer. When the GCSPR sensor was rotated azimuthally by 0 deg and 58 deg, the phase detection sensitivities were approximately 3.2×107RIU and 5.5×108RIU, respectively. The azimuth angle of 58 deg was found to enhance the sensor sensitivity by a factor of 5.87 relative to the azimuth angle of 0 deg.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Wen-Kai Kuo ; Chih-Hao Chang ; Chien-Jang Wu and Hsin-Her Yu
"Phase-detection-sensitivity enhancement of grating-coupled surface plasmon resonance sensor with light incident at nonzero azimuth angle", J. Nanophoton. 6(1), 063524 (Oct 31, 2012). ; http://dx.doi.org/10.1117/1.JNP.6.063524


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