Specific detection of proteins using photonic crystal waveguides
- 23 September 2008
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 16 (20) , 15949-15957
Abstract
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.Keywords
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