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Efficient light absorption in a new Bragg fiber-based plasmonic sensor

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Abstract

We report the results of a numerical simulation for a new Bragg fiber-based plasmonic sensor, with two gold layers used as reflectors, which exploits the interaction between core-guided modes and plasmon modes near the loss matching point to achieve high amplitude sensitivity (2483.0RIU1) and a better detection limit (4.0×106RIU). Another advantage of the proposed sensing structure is that the difference between maximal amplitude sensitivity and resonant wavelengths is much smaller than that achieved for other similar sensors already reported in the literature (4.7 instead of 30 nm).

© 2015 Optical Society of America

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