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Authors: P.P.P. Debackere, S. Scheerlinck, P. Bienstman, R. Baets
Title: Surface plasmon interferometer in silicon-on-insulator: novel concept for an integrated biosensor
Format: International Journal
Publication date: 8/2006
Journal/Conference/Book: Optics Express
Volume(Issue): 14(16) p.7063-7072
Internal Reference: [N-497]
Download: Download this Publication (382KB) (382KB)

Abstract

We propose a novel configuration for a highly integrated and highly sensitive optical biosensor. The basic element of the sensor is a surface plasmon interferometer consisting of a thin layer of gold embedded in a silicon membrane. We investigate the performance of the sensor by simulation using eigenmode expansion. We calculate that refractive index changes in the order of 10-6 RUI should be easily detectable for a component of length 10 micro meter. Moreover, we illustrate that the operation wavelength of the sensor can be easily tuned to a desired wavelength for a wide range of environmental refractive indices, making our device suitable for chemo- and biosensing.

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