Journal article
Demonstration of reverse symmetry waveguide sensing in aqueous solutions
In
Applied Physics Letters
—
2002, Volume 81, Issue 12, pp. 2166-2168
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 n(S)=1.193, hence, with an aqueous cover refractive index of n(C)=1.331, a reverse symmetry (n(S)
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. (C) 2002 American Institute of Physics.
| Language: | English |
|---|---|
| Publisher: | American Institute of Physics |
| Year: | 2002 |
| Pages: | 2166-2168 |
| ISSN: | 10773118 and 00036951 |
| Types: | Journal article |
| DOI: | 10.1063/1.1508814 |
| ORCIDs: | Pedersen, H.C. and Larsen, N.B. |
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