Integrated multichannel Young's interferometer sensor based on long-range surface plasmon waveguides.
作者： Wei Ru Wong , Pierre Berini
DOI: 10.1364/OE.27.025470
关键词:
摘要: Two integrated Young’s interferometer (YI) sensors based on long-range surface plasmon polariton (LRSPP) waveguides are presented. The first sensor is single-channel and a Y-junction splitter, the other multi-channel corporate feed structure. multichannel YI enables simultaneous independent phase-based monitoring of refractive index changes in multiple channels. diverging output beams from overlapped far field to form interference patterns which then post-processed using fast Fourier transform (FFT) algorithm extract phase values. sensing capability these YIs was demonstrated through sequential injection solutions with increasing into A detection limit ∼ 1 × 10−6 RIU obtained for both LRSPP YIs, significant improvement over measurements similar structures attenuation-based sensing.
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