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Microfabricated optofluidic ring resonator structures.


ABSTRACT: We describe the fabrication and preliminary optical characterization of rugged, Si-micromachined optofluidic ring resonator (μOFRR) structures consisting of thin-walled SiO(x) cylinders with expanded midsections designed to enhance the three-dimensional confinement of whispering gallery modes (WGMs). These μOFRR structures were grown thermally at wafer scale on the interior of Si molds defined by deep-reactive-ion etching and pre-treated to reduce surface roughness. Devices 85-μm tall with 2-μm thick walls and inner diameters ranging from 50 to 200 μm supported pure-mode WGMs with Q-factors >10(4) near 985 nm. Advantages for eventual vapor detection in gas chromatographic microsystems are highlighted.

SUBMITTER: Scholten K 

PROVIDER: S-EPMC3206893 | biostudies-other | 2011 Oct

REPOSITORIES: biostudies-other

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