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