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Sensors 2017, 17(11), 2584;

Mach-Zehnder Interferometer Refractive Index Sensor Based on a Plasmonic Channel Waveguide

Department of Physics, Chung-Ang University, Seoul 156-756, Korea
Author to whom correspondence should be addressed.
Received: 21 September 2017 / Revised: 2 November 2017 / Accepted: 7 November 2017 / Published: 9 November 2017
(This article belongs to the Special Issue Surface Plasmon Resonance Sensing)
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A Mach-Zehnder interferometer based on a plasmonic channel waveguide is proposed for refractive index sensing. The structure, with a small physical footprint of 20 × 120 μm2, achieved a high figure of merit of 294. The cut-off frequency behaviour in the plasmonic channel waveguide resulted in a flat dispersion curve, which induces a 1.8 times larger change of the propagation constant for the given refractive index change compared with previously reported results. View Full-Text
Keywords: plasmonics; index sensor; waveguide plasmonics; index sensor; waveguide

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Lee, D.E.; Lee, Y.J.; Shin, E.; Kwon, S.-H. Mach-Zehnder Interferometer Refractive Index Sensor Based on a Plasmonic Channel Waveguide. Sensors 2017, 17, 2584.

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