title: Optofluidic notch filter integration by lift-off of thin films.
abstract: Optofluidic platforms used for biomolecular detection require spectral filtering for distinguishing analyte signals from unwanted background. Towards a fully integrated platform, an on-chip filter is required. Selective deposition of dielectric thin films on an optofluidic sensor based on antiresonant reflecting optical waveguide (ARROW) technology provides the means for localized, on-chip optical filtering. We present a lift-off technique, compatible with thin-film processing including plasma-enhanced chemical vapor and sputtering deposition. The resulting optofluidic notch filters exhibited a 20 dB rejection with linewidths as low as 20 nm for approximately 1 cm long chips consisting of liquid-core and solid-core waveguides.
authors.affiliation: ECEn Department, Brigham Young University, 459 Clyde Building, Provo, UT 84602, USA.
authors.forename: Brian S
authors.initials: BS
authors.lastname: Phillips
authors.forename: Philip
authors.initials: P
authors.lastname: Measor
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhao
authors.forename: Holger
authors.initials: H
authors.lastname: Schmidt
authors.forename: Aaron R
authors.initials: AR
authors.lastname: Hawkins
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