ε-Near-Zero Materials for Highly Miniaturizable Magnetoplasmonic Sensing Devices
Source abstract
Abstract
We show here the design of a magnetoplasmonic sensing platform consisting of a bilayer of a transparent conducting oxide and a gold film grown on a ferromagnetic substrate. Near the bulk plasmon frequency (ε ≈ 0) of the oxide film, sharp resonances are observed for the transverse magneto-optical Kerr effect, which are used for sensing permittivity changes. As a proof of concept, we demonstrate that the proposed architecture is able to detect glucose at millimolar concentration levels in aqueous media, even without any surface functionalization. Because no prism coupler is needed, the sensing platform may be miniaturized and employed in microfluidic systems for point-of-care devices.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Plasmonic and Surface Plasmon Research · Advanced Fiber Optic Sensors · Gold and Silver Nanoparticles Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Escuela de Física, Universidad Pedagógica y Tecnológica de Colombia, Avenida Central del Norte 39-115, Tunja 150003, Colombia
São Carlos Institute of Physics, University of São Paulo, CP 369, 13560-970 São Carlos, São Paulo, Brazil
National Institute of Telecommunications (Inatel), 37540-000 Santa Rita do Sapucaí, Minas Gerais, Brazil
Funding
Conselho Nacional de Desenvolvimento Científico e Tecnológico · Fundação de Amparo à Pesquisa do Estado de São Paulo
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