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A waveguide-coupled surface-plasmon sensor for an aqueous environment

Lavers, C. and Wilkinson, J.S. (1994) A waveguide-coupled surface-plasmon sensor for an aqueous environment Sensors and Actuators B: Chemical, 22, (1), pp. 75-81.

Record type: Article

Abstract

Planar optical waveguides integrated with thin-film dielectric and metallic overlayers may be configured as transducers to probe the optical properties of a broad range of sensing films. We present a simple sensor consisting of a potassium ion-exchanged glass waveguide coated with a dielectric buffer layer and a thin silver film to demonstrate optical waveguide-coupled surface-plasmon resonance in an aqueous environment. For a given operating wavelength, the use of an intermediate buffer layer allows tuning of the coupling to a surface plasma wave in water. Theoretical and experimental results confirm that a magnesium fluoride buffer layer may be used to allow operation in an aqueous environment at visible wavelengths. In conjunction with thin sensing films, this waveguide probe is expected to find application in immunosensors for monitoring water pollution.

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More information

Published date: October 1994
Keywords: surface-plasmon sensor, waveguide coupling

Identifiers

Local EPrints ID: 78256
URI: http://eprints.soton.ac.uk/id/eprint/78256
ISSN: 0925-4005
PURE UUID: 2cbc2325-06bf-426b-a2c9-54cb51fc49f5
ORCID for J.S. Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 07 Oct 2017 17:52

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Contributors

Author: C. Lavers
Author: J.S. Wilkinson ORCID iD

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