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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/47442

Title: Coupled waveguide-surface plasmon resonance biosensor with subwavelength grating
Authors: S.-J. Chen
F.-C. Chien
C.-Y. Lin
J.-N. Yih
K.-L. Lee
C.-W. Chang
P.-K. Wei
C.-C. Sun
Contributors: 國立臺灣海洋大學:光電科學研究所
Keywords: Optical biosensor
Waveguide
Surface plasmon resonance
Diffraction grating
Subwavelength structure
Date: 2007-01
Issue Date: 2018-07-23T03:08:13Z
Publisher: Biosensors and Bioelectronics
Abstract: Abstract: This study develops a coupled waveguide–surface plasmon resonance (CWSPR) biosensor with a subwavelength grating structure for the real-time analysis of biomolecular interactions. In the proposed optical metrology system, normally incident white light is coupled into the waveguide layer through the subwavelength grating structure thereby enhancing the wave vector which excites the surface plasmons on the metal sensing surface. The proposed CWSPR biosensor not only retains the same sensing sensitivity as that of a conventional surface plasmon resonance device, but also yields a sharper dip in the reflectivity spectrum and therefore provides an improved measurement precision. Moreover, the metrology setup overcomes the limitations of the conventional Kretschmann attenuated total reflection approach and is less sensitive to slight variations in the angle of the incident light. The experimental results confirm that the current CWSPR biosensor provides a straightforward yet powerful technique for real-time biomolecular interaction analysis.
Relation: 22(11) pp.2737-2742
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/47442
Appears in Collections:[光電科學研究所] 期刊論文

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