title: Microfluidic sensor based on integrated optical hollow waveguides.
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.
authors.affiliation: Department of Information Engineering, Seconda Università di Napoli, Via Roma 29, 81031 Aversa, Italy. stefania.campopiano@unina2.it
authors.forename: Stefania
authors.initials: S
authors.lastname: Campopiano
authors.forename: Romeo
authors.initials: R
authors.lastname: Bernini
authors.forename: Luigi
authors.initials: L
authors.lastname: Zeni
authors.forename: Pasqualina M
authors.initials: PM
authors.lastname: Sarro