Journal of Sensors / 2015 / Article / Fig 7

Research Article

Self-Referenced Plasmon Waveguide Resonance Sensor Using Different Waveguide Modes

Figure 7

(a) The comparison of angular reflectance spectra with silica film and MgF2 film as the dielectric layers. The gold film, silica film, and MgF2 film have the thickness of 55 nm, 1000 nm, and 1650 nm. The refractive indices of the prism, gold, silica, MgF2, and water are 1.515, 0.133 + 3.654, 1.46, 1.38, and 1.33, respectively. The incident wavelength is 632.8 nm. (b) The electric field strengths in different waveguide modes under resonance condition are plotted against the distance from the film/water interface.
(a)
(b)

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