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Opt Express. 2009 Feb 16;17(4):2255-63.

Designing efficient zero calibration point for phase-sensitive surface plasmon resonance biosensing.

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Engineering Physics Department, Ecole Polytechnique de Montréal, C. P. 6079, succ. Centre-Ville, Montréal (Québec), Canada, H3C 3A7.


This work is related to the development of phase-sensitive methodologies in Surface Plasmon Resonance (SPR) biosensing. We take advantage of a specific angular dependence of phase of light, reflected under SPR geometry, on parameters of the SPR-supporting metal, and propose a polarimetry-based methodology to easily determine the optimal calibration zero point, corresponding to the maximal phase sensitivity. The proposed methodology can significantly facilitate the calibration of the system in field and multi-channel sensing, broaden the dynamic range, as well as contribute to the development of feedback loops.

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