Photonic crystal resonator integrated in a microfluidic system

Details Photonic crystal resonator integrated in a microfluidic system Photonic crystal resonator integrated in a microfluidic system

2008-09-23

arxiv.org/abs/0809.3865v1

Opt. Lett. 33, 1623 (2008)

Physics

Optics

Scientific paper

10.1364/OL.33.001623

We report on a novel optofluidic system consisting of a silica-based 1D photonic crystal, integrated planar waveguides and electrically insulated fluidic channels. An array of pillars in a microfluidic channel designed for electrochromatography is used as a resonator for on-column label-free refractive index detection. The resonator was fabricated in a silicon oxynitride platform, to support electroosmotic flow, and operated at 1.55 microns. Different aqueous solutions of ethanol with refractive indices ranging from n = 1.3330 to 1.3616 were pumped into the column/resonator and the transmission spectra were recorded. Linear shifts of the resonant wavelengths yielded a maximum sensitivity of 480 nm/RIU and a minimum difference of 0.007 RIU was measured.

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