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Sensors 2018, 18(5), 1352;

Fused Microknot Optical Resonators in Folded Photonic Tapers for in-Liquid Durable Sensing

School of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
Authors to whom correspondence should be addressed.
Received: 4 March 2018 / Revised: 2 April 2018 / Accepted: 19 April 2018 / Published: 26 April 2018
(This article belongs to the Special Issue Optical Fiber Sensors 2017)
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Optical microknot fibers (OMFs) serve as localized devices, where photonic resonances (PRs) enable self-interfering elements sensitive to their environment. However, typical fragility and drifting of the knot severely limit the performance and durability of microknots as sensors in aqueous settings. Herein we present the fabrication, electrical fusing, preparation, and persistent detection of volatile liquids in multiple wetting–dewetting cycles of volatile compounds and quantify the persistent phase shifts with a simple model relating to the ambient liquid, enabling durable in-liquid sensing employing OMF PRs. View Full-Text
Keywords: optical resonators; optical sensing; liquids sensors optical resonators; optical sensing; liquids sensors

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Logvinova, A.; Shahal, S.; Fridman, M.; Linzon, Y. Fused Microknot Optical Resonators in Folded Photonic Tapers for in-Liquid Durable Sensing. Sensors 2018, 18, 1352.

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