Abstract
A technique for using surface plasmon resonance to characterize dispersive refractive-index and absorption profiles is reported. This is accomplished by simultaneously exciting surface plasmon resonance at multiple angles and multiple wavelengths and then analyzing the resulting resonance profiles. By calibrating with liquids of known refractive index profiles, the refractive index spectrium of solid or liquid samples can be measured. Preliminary experimental results demonstrate a refractive index sensitivity of 6 × 10 −4 between 580 and 700 nm for refractive indices from 1.3 to 1.5.
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