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Refractive Index Sensing through Surface Plasmon Resonance in Light-Diffusing Fibers

Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy
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Appl. Sci. 2018, 8(7), 1172; https://doi.org/10.3390/app8071172
Received: 28 June 2018 / Revised: 16 July 2018 / Accepted: 16 July 2018 / Published: 18 July 2018
(This article belongs to the Special Issue Photonic Metamaterials)
In this paper, we show that light-diffusing fibers (LDF) can be efficiently used as host material for surface plasmon resonance (SPR)-based refractive index sensing. This novel platform does not require a chemical procedure to remove the cladding or enhance the evanescent field, which is expected to give better reproducibility of the sensing interface. The SPR sensor has been realized by first removing the cladding with a simple mechanical stripper, and then covering the unclad fiber surface with a thin gold film. The tests have been carried out using water–glycerin mixtures with refractive indices ranging from 1.332 to 1.394. The experimental results reveal a high sensitivity of the SPR wavelength to the outer medium’s refractive index, with values ranging from ~1500 to ~4000 nm/RIU in the analyzed range. The results suggest that the proposed optical fiber sensor platform could be used in biochemical applications. View Full-Text
Keywords: light-diffusing fibers (LDF); surface plasmon resonance (SPR); optical sensors light-diffusing fibers (LDF); surface plasmon resonance (SPR); optical sensors
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MDPI and ACS Style

Cennamo, N.; Zeni, L.; Catalano, E.; Arcadio, F.; Minardo, A. Refractive Index Sensing through Surface Plasmon Resonance in Light-Diffusing Fibers. Appl. Sci. 2018, 8, 1172. https://doi.org/10.3390/app8071172

AMA Style

Cennamo N, Zeni L, Catalano E, Arcadio F, Minardo A. Refractive Index Sensing through Surface Plasmon Resonance in Light-Diffusing Fibers. Applied Sciences. 2018; 8(7):1172. https://doi.org/10.3390/app8071172

Chicago/Turabian Style

Cennamo, Nunzio; Zeni, Luigi; Catalano, Ester; Arcadio, Francesco; Minardo, Aldo. 2018. "Refractive Index Sensing through Surface Plasmon Resonance in Light-Diffusing Fibers" Appl. Sci. 8, no. 7: 1172. https://doi.org/10.3390/app8071172

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