Lossy mode resonance sensors based on nanocoated multimode-coreless-multimode fibre

•Lossy mode resonances can be generated with a multimode coreless multimode fiber.•Spectral, SEM and refractive index sensitivity characterization was performed.•The maximum sensitivity attained with this structure approaches 10000 nm/RIU.•A biosensor for anti-IgGs was fabricated, which could detect...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2020-02, Vol.304, p.126955, Article 126955
Main Authors: Vicente, Adrian, Santano, Desiree, Zubiate, Pablo, Urrutia, Aitor, Del Villar, Ignacio, Zamarreño, Carlos Ruiz
Format: Article
Language:English
Subjects:
Biosensor
Optical fibre sensor
Organic chemistry
Refractivity
Refractometer
Resonance
Thin-film
Tin oxides
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Summary:•Lossy mode resonances can be generated with a multimode coreless multimode fiber.•Spectral, SEM and refractive index sensitivity characterization was performed.•The maximum sensitivity attained with this structure approaches 10000 nm/RIU.•A biosensor for anti-IgGs was fabricated, which could detect from 1 to 40 mgr/L. In this work it is proved the ability to obtain lossy mode resonances (LMRs) in the transmission spectrum with multimode-coreless-multimode fibre optic structure coated with tin oxide on the coreless segment. The devices were characterized as a function of the surrounding medium refractive index and sensitivities of 7346.93 nm/RIU and 708.57 nm/RIU were attained for the first and the second LMR respectively. As an application proof of this technology, one of the devices was biofunctionalized and used for detecting goat anti-mouse IgG in concentrations ranging from 1 to 40 mg/L, with a limit of detection of 0.6 mg/L. This proves the ability of this simple structure to be used for biological, chemical or environmental applications.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2019.126955