Journal
OPTICS EXPRESS
Volume 16, Issue 20, Pages 15949-15957Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.16.015949
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- U. S. Air Force Office of Scientific Research
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- National Research Council of Canada National Institute of Nanotechnology (NRC-NINT)
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Specific detection of proteins is demonstrated using planar photonic crystal waveguides. Using immobilized biotin as probe, streptavidin was captured, causing the waveguide mode cut-off to red-shift. The device was shown to detect a 2.5 nm streptavidin film with a 0.86 nm cut-off red-shift. An improved photonic crystal waveguide sensor design is also described and shown to have a 40% improved bulk refractive index response. (C) 2008 Optical Society of America
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