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Opt Lett. 2004 Aug 15;29(16):1894-6.

Microfluidic sensor based on integrated optical hollow waveguides.

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  • 1Department of Information Engineering, Seconda Universit√† di Napoli, Via Roma 29, 81031 Aversa, Italy. stefania.campopiano@unina2.it

Abstract

A simple integrated optical refractometric sensor based on hollow-core antiresonant reflecting optical waveguides is proposed. The sensor uses the antiresonant reflecting guidance mechanism and permits one to measure the refractive index of a liquid filling the core by simply monitoring the transmitted spectrum. The device has been made with standard silicon technology, and the experimental results confirm numerical simulations performed in one- and two-dimensional geometry. The sensor exhibits a linear response over a wide measurement range (1.3330-1.4450) and a resolution of 9 x 10(-4) and requires a small analyte volume.

PMID:
15357351
[PubMed]
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