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Journal Articles Journal of the Optical Society of America. A Optics, Image Science, and Vision Year : 2015

Compact interferometer transducer based on surface plasmon phase resonance

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Abstract

We propose a new monolithic interferometric configuration and implement a novel method for spectroscopic phase shift detection of surface plasmon resonance (SPR) sensors. The interference pattern is obtained using a nonpolarizing beam splitter cube with two attached right angle prisms in such a way that each interference field undergoes two total internal reflections (TIR) at prisms/air interface and one attenuated total reflection (ATR) through surface plasmon interaction. The evanescent part of the interferogram around the Zero optical path difference (ZOPD) is sampled and detected in the far field, thanks to a bidimensional array of scattering optical near-field probes deposited on the corresponding prism surface. A Fourier transform of the sampled interferogram is performed to measure the input light wavelength, while a direct comparison of the interferogram in TM and TE polarization modes allows us to determine the differential phase shift induced by the SPR layer. The phase shift measurement is made possible thanks to a remarkable time stability of the interferogram in the glass bulk. By tuning the input laser wavelength around the resonance, we show a good agreement between experimental and theoretical calculations for both amplitude and phase spectral responses.
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Dates and versions

hal-02298377 , version 1 (26-09-2019)

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Yassine Hadjar, Mikael Renault, Sylvain Blaize, Aurélien Bruyant, Rémi Vincent, et al.. Compact interferometer transducer based on surface plasmon phase resonance. Journal of the Optical Society of America. A Optics, Image Science, and Vision, 2015, 32 (5), pp.771. ⟨10.1364/JOSAA.32.000771⟩. ⟨hal-02298377⟩

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