Near-infrared surface plasmon resonance sensing on a silicon platform

Abstract A novel surface plasmon resonance (SPR) sensing configuration equipped with a silicon coupling prism is described. Theoretical results and experimental data are obtained to establish essential conditions of SPR excitation using infrared light in the Kretschmann–Raether geometry with a thin gold layer as the supporting metal. We also compare sensitivities of different angular and spectral interrogation Si-based schemes in models of bio- and chemical sensing. Possibilities for the miniaturization of SPR sensors using the proposed Si-based configuration are discussed.

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