Abstract
Based on the configuration of surface plasmon resonance (SPR) sensor, the SPR
sensor model is set up, and the thermo-properties of various parts in the model are
discussed. The thermo-characteristics of SPR spectra in wavelength interrogation and
angular interrogation are investigated. Results show that thermo-optic and
dispersion effects in the model deteriorate the sensitivity of SPR sensor,
especially the thermo-optic effects. Mathematical expression is established to
describe the resonance wavelength or angle, which is dependent of temperature. It
demonstrates that the thermo-property of sensing medium excites the fluctuation of
resonance wavelength or angle more intensely than that of the substrate or metal
film in 1-2 orders. Our theoretical research is consistent with the previous
experimental results.
© 2012 Chinese Optics Letters
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