Figure 2

Enhancing the sensitivity of a plasmonic interferometer with the dye assay. (A) Relative intensity change plotted as a function of wavelength for a groove-slit-groove (GSG) plasmonic interferometer with 250±6 μm glucose in the presence (red solid line) or absence (blue dashed line) of the assay. Both spectra are normalized to a reaction mixture with 0 μm glucose (black solid line). (B) Calibration curves for the same GSG device used in part (A) as function of glucose concentration in the presence (red squares, λ=571 nm) or absence (blue circles, λ=628 nm) of the assay.

© De Gruyter