Phase interrogation of an integrated optical SPR sensor

Sheridan, A.K. and Harris, R.D. and Bartlett, P.N. and Wilkinson, J.S. (2004) Phase interrogation of an integrated optical SPR sensor. Sensors and Actuators B: Chemical, 97 (1). pp. 114-121. ISSN 0925-4005 (https://doi.org/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.

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• Item metadata

  Item type:	Article
  ID code:	38729
  Dates:	Date Event 2004 Published
  Subjects:	Technology > Electrical engineering. Electronics Nuclear engineering
  Department:	Faculty of Engineering > Electronic and Electrical Engineering
  Depositing user:	Pure Administrator
  Date deposited:	27 Mar 2012 11:25
  Last modified:	11 Nov 2024 08:57
  URI:	https://strathprints.strath.ac.uk/id/eprint/38729