Phase interrogation of an integrated optical SPR sensor
Phase interrogation of an integrated optical SPR sensor
A theoretical analysis of the phase behaviour of an integrated optical surface plasmon resonance (SPR) sensor is presented, in which the complex transmittance of a dielectric waveguide coated with a thin film of gold is determined for varying superstrate index. Exploitation of the phase sensitivity is studied theoretically by incorporating gold-coated waveguides on both branches of a Mach–Zehnder interferometer (MZI), one or both of which may be exposed to superstrate index variations or thin adlayers. It is proposed that this device can be used to suppress unwanted refractive index changes common to both branches, for example, due to temperature variations, and may show enhanced sensitivity.
114-121
Sheridan, Anna K.
d9ecb738-f1a7-4c4d-ae62-4ae0e9721cd4
Harris, Richard
0550d258-245a-4d0f-b366-4a8bc580cda3
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
2004
Sheridan, Anna K.
d9ecb738-f1a7-4c4d-ae62-4ae0e9721cd4
Harris, Richard
0550d258-245a-4d0f-b366-4a8bc580cda3
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Sheridan, Anna K., Harris, Richard, Bartlett, Philip N. and Wilkinson, James S.
(2004)
Phase interrogation of an integrated optical SPR sensor.
Sensors and Actuators B: Chemical, 97 (1), .
(doi:10.1016/j.snb.2003.08.005).
Abstract
A theoretical analysis of the phase behaviour of an integrated optical surface plasmon resonance (SPR) sensor is presented, in which the complex transmittance of a dielectric waveguide coated with a thin film of gold is determined for varying superstrate index. Exploitation of the phase sensitivity is studied theoretically by incorporating gold-coated waveguides on both branches of a Mach–Zehnder interferometer (MZI), one or both of which may be exposed to superstrate index variations or thin adlayers. It is proposed that this device can be used to suppress unwanted refractive index changes common to both branches, for example, due to temperature variations, and may show enhanced sensitivity.
More information
Published date: 2004
Identifiers
Local EPrints ID: 13953
URI: http://eprints.soton.ac.uk/id/eprint/13953
ISSN: 0925-4005
PURE UUID: 220ca18c-5d1a-4fea-8a9f-3bc7ab646b04
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Date deposited: 12 Jan 2005
Last modified: 16 Mar 2024 02:42
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Author:
Anna K. Sheridan
Author:
Richard Harris
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