Silicon photonic wire evanescent field sensors: Sensor arrays and instrumentation

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DOIResolve DOI: http://doi.org/10.1117/12.875471
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TypeArticle
Proceedings titleProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ConferenceFrontiers in Biological Detection: From Nanosensors to Systems III, 22 January 2011 through 23 January 2011, San Francisco, CA
ISSN1605-7422
ISBN9780819484253
Volume7888
Article number788805
SubjectAffinity binding; label-free sensors; photonic wires; ring resonators; silicon photonics; Biosensors; Fluidics; Instruments; Nanosensors; Optical resonators; Optical waveguides; Photonic devices; Sensor arrays; Waveguides; Wire
AbstractWe are developing a photonic wire evanescent field (PWEF) sensor chip using 260 nm x 450 nm cross-section silicon photonic wire waveguides. The waveguide mode is strongly localized near the silicon surface, so that light interacts strongly with molecules bound to the waveguide surface. The millimeter long sensor waveguides can be folded into tight spiral structures less than 200 micrometers in diameter, which can be arrayed at densities up to ten or more independent sensors per square millimeter. The long propagation length in each sensor element gives a response to molecular binding much better than currently available tools for label-free molecular sensing. Cost of instrumentation, cost per measurement, ease-of-use, and the number of sensors that can be simultaneously monitored on a sensor array chip are equally important in determining whether an instrument is practical for the end user and hence commercially viable. The objective of our recent work on PWEF sensor array chips and the associated instrumentation is to address all of these issues. This conference paper reviews our ongoing work on the photonic wire sensor chip design and layout, on-chip integrated fluidics, optical coupling, and chip interrogation using arrays of grating couplers formed using sub-wavelength patterned structures. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
Publication date
LanguageEnglish
AffiliationNRC Institute for Microstructural Sciences; NRC Steacie Institute for Molecular Sciences; Measurement Science and Standards; Human Health Therapeutics; National Research Council Canada
Peer reviewedYes
NPARC number21271759
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Record identifier08e3d582-2590-4036-b0b3-f748044249bb
Record created2014-03-24
Record modified2016-05-09
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