Microfluidic sensor based on integrated optical hollow waveguides
S Campopiano (External organisation)
R Bernini (External organisation)
L Zeni (External organisation)
P. M. Sarro (TU Delft - Electronic Components, Technology and Materials)
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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 9×10^-4 and requires a small analyte volume. © 2004 Optical Society of America
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