Self-Referenced Plasmon Waveguide Resonance Sensor Using Different Waveguide Modes

Figure 6

(a) The angular reflectance spectra with the MgF₂ film thickness of 1600 nm and 1650 nm measuring the samples with different refractive indices. (b) The electric field strengths in different waveguide modes under resonance condition are plotted against the distance from the prism surface. The gold film has the thickness of 55 nm. The refractive indices of the prism, gold, silica, and water are 1.515, 0.133 + 3.654, 1.46, and 1.33, respectively. The incident wavelength is 632.8 nm.

(a)

(b)