Photonic crystal resonator integrated in a microfluidic system
- 14 July 2008
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 33 (14), 1623-1625
- https://doi.org/10.1364/ol.33.001623
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 electro-osmotic flow, and operated at . 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 /RIU (refractive index unit), and a minimum difference of RIU was measured.
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