Highly sensitive, localized surface plasmon resonance fiber device for environmental sensing, based upon a structured bi-metal array of nano-wires

Allsop, Thomas D.P., Neal, Ron, Mou, Chengbo, Kalli, Kyriacos and Webb, David J. Highly sensitive, localized surface plasmon resonance fiber device for environmental sensing, based upon a structured bi-metal array of nano-wires. Optics Letters, 39 (20), pp. 5798-5801.

Abstract

We demonstrate a bi-metal coated (platinum and gold or silver), localized surface plasmon resonance fiber sensor with an index sensitivity exceeding 11,900 nm/RIU, yielding an index resolution of 2 × 10-5 in the aqueous index regime. This is one of the highest index sensitivities achieved with an optical fiber sensor. The coatings consist of arrays of bi-metal nano-wires (typically 36 nm in radius and 20 μm in length), supported by a silicon dioxide thin film on a thin substrate of germanium, the nano-wires being perpendicular to the longitudinal axis of the D-shaped fiber.

Publication DOI: https://doi.org/10.1364/OL.39.005798
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Institute of Photonics
Additional Information: Funding: EPSRC (EP/J010413)
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Full Text Link: http://www.scopus.com/inward/record.url?scp=84908101943&partnerID=8YFLogxK
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Authors: Allsop, Thomas D.P.
Neal, Ron
Mou, Chengbo
Kalli, Kyriacos
Webb, David J.

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