Demonstration of reverse symmetry waveguide sensing in aqueous solutions

R. Horváth, Henrik C. Pedersen, Niels B. Larsen

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

A reverse symmetry waveguide is presented for evanescent wave sensing in aqueous solutions. The waveguide consists of a thin polystyrene film, supported by a thicker substrate layer of nanoporous silica on glass. The nanoporous substrate layer has a refractive index of nS=1.193, hence, with an aqueous cover refractive index of nC=1.331, a reverse symmetry (nSC) is obtained. A surface relief grating formed in the polystyrene film is used as a coupling element. Sensitivities considerably higher than for a conventional waveguide sensor are demonstrated.

Original languageEnglish
Pages (from-to)2166-2168
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number12
DOIs
Publication statusPublished - Sep 16 2002

Fingerprint

aqueous solutions
waveguides
polystyrene
symmetry
refractivity
evanescent waves
gratings
silicon dioxide
glass
sensitivity
sensors

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Demonstration of reverse symmetry waveguide sensing in aqueous solutions. / Horváth, R.; Pedersen, Henrik C.; Larsen, Niels B.

In: Applied Physics Letters, Vol. 81, No. 12, 16.09.2002, p. 2166-2168.

Research output: Contribution to journalArticle

Horváth, R. ; Pedersen, Henrik C. ; Larsen, Niels B. / Demonstration of reverse symmetry waveguide sensing in aqueous solutions. In: Applied Physics Letters. 2002 ; Vol. 81, No. 12. pp. 2166-2168.
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