Compact interferometer transducer based on surface plasmon phase resonance

Yassine Hadjar 1 Mikael Renault 1 Sylvain Blaize 1 Aurélien Bruyant 1 Rémi Vincent 1 Abdelhamid Hmima 1
1 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique
ICD - Institut Charles Delaunay
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.
Keywords : Electron beam lithography Optical components Phase measurement Phase modulation Phase shift Surface plasmon resonance sensors
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Journal articles
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Submitted on : Thursday, September 26, 2019 - 4:52:47 PM
Last modification on : Friday, September 27, 2019 - 1:27:39 AM

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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, Optical Society of America, 2015, 32 (5), pp.771. ⟨10.1364/JOSAA.32.000771⟩. ⟨hal-02298377⟩

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