A waveguide-coupled surface-plasmon sensor for an aqueous environment
A waveguide-coupled surface-plasmon sensor for an aqueous environment
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.
surface-plasmon sensor, waveguide coupling
75-81
Lavers, C.
667e2391-3ee5-4b2f-a6f1-7e10c415553c
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca
October 1994
Lavers, C.
667e2391-3ee5-4b2f-a6f1-7e10c415553c
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Lavers, C. and Wilkinson, J.S.
(1994)
A waveguide-coupled surface-plasmon sensor for an aqueous environment.
Sensors and Actuators B: Chemical, 22 (1), .
(doi:10.1016/0925-4005(94)01260-1).
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.
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
Catalogue record
Date deposited: 11 Mar 2010
Last modified: 14 Mar 2024 02:32
Export record
Altmetrics
Contributors
Author:
C. Lavers
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
