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Título:
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Performance improvement of refractometric sensors through hybrid plasmonic-Fano resonances
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Autores:
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Elshorbagy, Mahmoud Hamdy Mohamed ;
Cuadrado Conde, Alexander ;
González Contreras, Gabriel ;
González Contreras, Francisco Javier ;
Alda, Javier
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Tipo de documento:
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texto impreso
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Editorial:
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IEEE, 2019-03-27
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = En prensa
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Materia = Ciencias: Física: Electromagnetismo
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Materia = Ciencias: Física: Optica
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Tipo = Artículo
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Resumen:
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In this paper, we present a plasmonic refractometric sensor that works under normal incidence; allowing its integration on a fiber tip. The sensor's material and geometry exploit the large scattering cross-section given by high-contrast of the index of refraction subwavelength dielectric gratings. Our design generates a hybrid plasmonic-Fano resonance due to the interference between the surface plasmon resonance and the grating response. We optimize the sensor with a merit function that combines the quality parameter of the resonance and the field enhancement at the interaction volume where the plasmon propagates. Our device shows a high sensitivity (1000 nm/RIU) and a high Figure of Merit (775 RIU?1). Degradation in performance is negligible through a wide dynamic range up to 0.7 RIU. These quantitative parameters overperform compared to similar plasmonic sensors.
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En línea:
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https://eprints.ucm.es/54731/1/ALDA19_fanohybrid_jlt2019.pdf
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