Photonic crystal resonator integrated in a microfluidic system
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.
Cite
@article{arxiv.0809.3865,
title = {Photonic crystal resonator integrated in a microfluidic system},
author = {P. S. Nunes and N. A. Mortensen and J. P. Kutter and K. B. Mogensen},
journal= {arXiv preprint arXiv:0809.3865},
year = {2008}
}