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arXiv · 0809.3865

Photonic crystal resonator integrated in a microfluidic system

P. S. Nunes·N. A. Mortensen·J. P. Kutter·K. B. Mogensen
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Abstract

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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P. S. Nunes, N. A. Mortensen, J. P. Kutter, K. B. Mogensen. 2008-09-23. Photonic crystal resonator integrated in a microfluidic system. https://doi.org/10.1364/ol.33.001623

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