Fused microknot optical resonators in folded photonic tapers for in-liquid durable sensing

Alexandra Logvinova, Shir Shahal, Moti Fridman, Yoav Linzon

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


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.

Original languageEnglish
Article number1352
Issue number5
StatePublished - May 2018

Bibliographical note

Funding Information:
Acknowledgments: This work was supported by Israel Ministry of Science and Technology innovation in emerging applied and engineering research grant (MOST-16-010177808) Conflicts of Interest: The authors declare no conflict of interest. The funding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.

Publisher Copyright:
© 2018 by the authors. Licensee MDPI, Basel, Switzerland.


  • Liquids sensors
  • Optical resonators
  • Optical sensing


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