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Título: | Nanoantennas Patterned by Colloidal Lithography for Enhanced Nanophosphor Light Emission |
Autor: | Viaña, José M.; Romero Aguilar, Manuel CSIC ORCID; Lozano, Gabriel CSIC ORCID; Míguez, Hernán CSIC ORCID | Palabras clave: | Plasmonics Patterning Nanosphere lithography Rare-earth nanoparticles Transparent thin films Photoluminescence Localized surface plasmon resonance (LSPR) Local density of optical states (LDOS) |
Fecha de publicación: | 11-nov-2022 | Editor: | American Chemical Society | Citación: | ACS Applied Nano Materials 5(11): 16242-16249 (2022) | Resumen: | Transparent coatings made of rare-earth doped nanocrystals, also known as nanophosphors, feature efficient photoluminescence and excellent thermal and optical stability. Herein, we demonstrate that the optical antennas prepared by colloidal lithography render thin nanophosphor films with a brighter emission. In particular, we fabricate gold nanostructures in the proximity of GdVO4:Eu3+ nanophosphors by metal evaporation using a mask made of a monolayer of polymer beads arranged in a triangular lattice. Optical modes supported by the antennas can be controlled by tuning the diameter of the polymer spheres in the colloidal mask, which determines the shape of the gold nanostructure, as confirmed by numerical simulations. Confocal microscopy reveals that metallic antennas induce brighter photoluminescence at specific spatial regions of the nanophosphor film at targeted frequencies as a result of the coupling between gold nanostructures and nanophosphors. Patterning of nanophosphor thin layers with arrays of metallic antennas offers an inexpensive nanophotonic solution to develop bright emitting coatings of interest for color conversion, labeling, or anti-counterfeiting. | Versión del editor: | https://doi.org/10.1021/acsanm.2c03258 | URI: | http://hdl.handle.net/10261/283470 | DOI: | 10.1021/acsanm.2c03258 | E-ISSN: | 2574-0970 |
Aparece en las colecciones: | (ICMS) Artículos |
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Nanophosphor-Light-Emission.pdf | 934,49 kB | Adobe PDF | Visualizar/Abrir |
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