Rodríguez Álvarez, JavierLabarta, AmílcarIdrobo, Juan CarlosDell'Anna, RossanaCian, AlessandroGiubertoni, DamianoBorrisé, XavierGuerrero, AlbertPérez Murano, FrancescFraile Rodríguez, ArantxaBatlle Gelabert, Xavier2024-01-232024-01-232023-04-241936-0851https://hdl.handle.net/2445/206183Plasmonic lattice nanostructures are of technological interest because of their capacity to manipulate light below the diffraction limit. Here, we present a detailed study of dark and bright modes in the visible and near-infrared energy regime of an inverted plasmonic honeycomb lattice by a combination of Au+ focused ion beam lithography with nanometric resolution, optical and electron spectroscopy, and finite-difference time-domain simulations. The lattice consists of slits carved in a gold thin film, exhibiting hotspots and a set of bright and dark modes. We proposed that some of the dark modes detected by electron energy-loss spectroscopy are caused by antiferroelectric arrangements of the slit polarizations with two times the size of the hexagonal unit cell. The plasmonic resonances take place within the 0.5−2 eV energy range, indicating that they could be suitable for a synergistic coupling with excitons in two-dimensional transition metal dichalcogenides materials or for designing nanoscale sensing platforms based on near-field enhancement over a metallic surface.10 p.application/pdfengcc-by (c) Rodriguez Alvarez, Javier et al., 2023http://creativecommons.org/licenses/by/3.0/es/Espectroscòpia de pèrdua d'energia d'electronsPlasmonsNanoestructuresElectron energy loss spectroscopyPlasmons (Physics)Nanostructuresinfo:eu-repo/semantics/article7394172024-01-23info:eu-repo/semantics/openAccess