Journal of Sensors / 2015 / Article / Fig 1

Research Article

Self-Referenced Plasmon Waveguide Resonance Sensor Using Different Waveguide Modes

Figure 1

(a) The schematic of the plasmon waveguide resonance sensing structure. (b) The angular reflectance spectrum. The gold and silica films have the thickness of 50 and 1000 nm, respectively. 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. (c) The electric field strengths in different waveguide modes under resonance condition are plotted against the distance from the prism surface. (d) The normalized electric field strengths in different waveguide modes under resonance conditions are plotted against the distance from the film/water interface.
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