| Autor: |
Alvarez, Javier Rodriguez, Labarta, Amilcar, Idrobo, Juan Carlos, Anna, Rossana Dell, Cian, Alessandro, Giubertoni, Damiano, Borrise, Xavier, Guerrero, Albert, Murano, Francesc Perez, Rodriguez, Arantxa Fraile, Batlle, Xavier |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
ACS Nano 17 (2023) 8123 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1021/acsnano.2c11016 |
| Popis: |
Plasmonic 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. |
| Databáze: |
arXiv |
| Externí odkaz: |
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