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Article Dans Une Revue Optics Letters Année : 2023

Common-mode plasmon sensing scheme as a high-sensitivity compact SPR sensor

Hugo Bruhier
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Julie Dutems
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Nicolas Crespo-Monteiro
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Isabelle Verrier
Pierre Berini

Résumé

A deep metal grating enables quasi-phase-matched simultaneous excitation of two counterpropagating surface plasmon modes by means of its +1st and –2nd diffraction orders. The resulting angular reflection spectra of the scattered –1st and zeroth orders exhibit three interleaved zeros and maxima in a range centered around the Littrow angle. The spectra differ thoroughly from the usual reflection dip resulting from single-order plasmon coupling that produces strong absorption. The zeroth and –1st orders exhibit two crossing angles enabling high-sensitivity common-mode detection schemes designed to reject variations in source power and environmental noise. The proof of concept and experimental assessment of this new surface plasmon resonance (SPR) sensing scheme are demonstrated by monitoring gases in a pressure-controlled chamber. A limit of detection (LOD) of 2 × 10 −7 refractive index unit (RIU) was achieved.
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Origine : Publication financée par une institution

Dates et versions

hal-04232873 , version 1 (17-10-2023)

Identifiants

Citer

Hugo Bruhier, Julie Dutems, Emilie Laffont, Nicolas Crespo-Monteiro, Isabelle Verrier, et al.. Common-mode plasmon sensing scheme as a high-sensitivity compact SPR sensor. Optics Letters, 2023, 48 (14), pp.3733. ⟨10.1364/OL.483692⟩. ⟨hal-04232873⟩
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