Evanescent field waveguide sensing with subwavelength grating structures in silicon-on-insulator

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DOIResolve DOI: http://doi.org/10.1364/OL.39.004442
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TypeArticle
Journal titleOptics Letters
ISSN0146-9592
Volume39
Issue15
Pages44424445; # of pages: 4
SubjectWaveguides; Delocalizations; Evanescent field waveguides; Sensing applications; Sensitivity enhancements; Sub-wave length grating; Sub-wavelength; Subwavelength grating waveguides; Surface sensing; Diffraction gratings
AbstractWe explore, to the best of our knowledge, the potential of diffractionless subwavelength grating waveguides for sensing applications. We show that by subwavelength patterning of silicon-wire waveguides the field delocalization can be engineered to increase the sensitivity. Fully vectorial 3D-FDTD simulations confirm the sensitivity enhancement, achieving sensitivities of 0.83 RIU/RIU and 1.5 · 10-3 RIU/nm for bulk and surface sensing, respectively, which compare favorably to state-of-the-art sensing waveguides.
Publication date
LanguageEnglish
AffiliationInformation and Communication Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21272815
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Record identifiere667c438-322f-48c2-aaf7-17684329aae7
Record created2014-12-03
Record modified2016-05-09
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