Sensitivity enhancement in evanescent optical waveguidesensors

G.J. Veldhuis; O. Parriaux; Hugo Hoekstra; Paul Lambeck

doi:10.1109/50.842082

Sensitivity enhancement in evanescent optical waveguidesensors

G.J. Veldhuis, O. Parriaux, Hugo Hoekstra, Paul Lambeck

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

It is shown, that the sensitivity of the effective refractive index on the cladding index in evanescent optical waveguide sensors, can be larger than unity. This implies that the attenuation of a guided wave propagating in a waveguide immersed in an absorptive medium can be made larger than that of a free-space wave propagating through the same medium. The conditions and physical explanation for this puzzling behavior are identified and as a practical application, an absorption sensor, based on a suspended silicon slab waveguide, is proposed where the sensitivity is enhanced by a factor of 1.35

Original language	Undefined
Pages (from-to)	677-682
Number of pages	5
Journal	Journal of lightwave technology
Volume	18
Issue number	vol 18
DOIs	https://doi.org/10.1109/50.842082
Publication status	Published - 2000

Keywords

METIS-112089
Chemical sensing
IR-15214
refractometry
evanescent field sensing
Integrated Optics

Access to Document

10.1109/50.842082

Sensitivity_enhancement-veldhuis

Cite this

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title = "Sensitivity enhancement in evanescent optical waveguidesensors",

abstract = "It is shown, that the sensitivity of the effective refractive index on the cladding index in evanescent optical waveguide sensors, can be larger than unity. This implies that the attenuation of a guided wave propagating in a waveguide immersed in an absorptive medium can be made larger than that of a free-space wave propagating through the same medium. The conditions and physical explanation for this puzzling behavior are identified and as a practical application, an absorption sensor, based on a suspended silicon slab waveguide, is proposed where the sensitivity is enhanced by a factor of 1.35",

keywords = "METIS-112089, Chemical sensing, IR-15214, refractometry, evanescent field sensing, Integrated Optics",

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T1 - Sensitivity enhancement in evanescent optical waveguidesensors

AU - Veldhuis, G.J.

AU - Parriaux, O.

AU - Hoekstra, Hugo

AU - Lambeck, Paul

PY - 2000

Y1 - 2000

N2 - It is shown, that the sensitivity of the effective refractive index on the cladding index in evanescent optical waveguide sensors, can be larger than unity. This implies that the attenuation of a guided wave propagating in a waveguide immersed in an absorptive medium can be made larger than that of a free-space wave propagating through the same medium. The conditions and physical explanation for this puzzling behavior are identified and as a practical application, an absorption sensor, based on a suspended silicon slab waveguide, is proposed where the sensitivity is enhanced by a factor of 1.35

AB - It is shown, that the sensitivity of the effective refractive index on the cladding index in evanescent optical waveguide sensors, can be larger than unity. This implies that the attenuation of a guided wave propagating in a waveguide immersed in an absorptive medium can be made larger than that of a free-space wave propagating through the same medium. The conditions and physical explanation for this puzzling behavior are identified and as a practical application, an absorption sensor, based on a suspended silicon slab waveguide, is proposed where the sensitivity is enhanced by a factor of 1.35

KW - METIS-112089

KW - Chemical sensing

KW - IR-15214

KW - refractometry

KW - evanescent field sensing

KW - Integrated Optics

U2 - 10.1109/50.842082

DO - 10.1109/50.842082

M3 - Article

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ER -