Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 232, Issue -, Pages 660-665Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.04.015
Keywords
D-shaped fiber; Lossy mode resonance; Optical fiber sensor; Refractometer
Funding
- Spanish Ministry of Economy and Competitiveness (MINECO) [FEDER TEC2013-43679-R]
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Here we show an optical refractometer with a giant sensitivity of 304,360 nm per refractive index unit (nm/RIU). This sensitivity corresponds to a resolution of 3.28 x 10(-9) RIU if a standard optical spectrum analyzer with a resolution of 1 pm is used. This record sensitivity is obtained by means of a lossy mode resonance (LMR) optical fiber sensor in a surrounding media with refractive index around 1.45. This achievement implies that the utilization of the LMR phenomenon opens the door to devices and systems that can beat, in terms of sensitivity, those used currently in real-time biomolecular analysis such as surface plasmon resonance (SPR) devices. (C) 2016 Elsevier B.V. All rights reserved.
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