Gold-coated multicore fiber interferometer for biosensing

T. Zhu; F. Chiavaioli; J. Villatoro; K. Chah; C. Caucheteur

doi:10.1117/12.3017593

20 June 2024 Gold-coated multicore fiber interferometer for biosensing

T. Zhu, F. Chiavaioli, J. Villatoro, K. Chah, C. Caucheteur

Proceedings Volume 12999, Optical Sensing and Detection VIII; 129992H (2024) https://doi.org/10.1117/12.3017593
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

In this study, we demonstrate a multicore fiber interferometer applied for insulin biosensing. This interferometer was produced by splicing a segment of a multicore fiber (MCF) fused to a standard single-mode fiber (SMF). Our investigation depicted that the interferometer's response to changes in refractive index (RI) was influenced by polarization when a thin gold layer was deposited at the end facet of the multicore fiber (MCF). The most significant sensitivity to RI was achieved when using P-polarized light with a ~10 nm-thick gold-coated sample. This gold-coated interferometer was subsequently functionalized for biosensing purposes and employed in the detection of insulin, successfully identifying insulin at a concentration level of 10−8 g/ml.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

T. Zhu, F. Chiavaioli, J. Villatoro, K. Chah, and C. Caucheteur "Gold-coated multicore fiber interferometer for biosensing", Proc. SPIE 12999, Optical Sensing and Detection VIII, 129992H (20 June 2024); https://doi.org/10.1117/12.3017593

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