Imaging of Antiferroelectric Dark Modes in an Inverted Plasmonic Lattice
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913206549610496 |
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| author | 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 |
| author_facet | 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 |
| contents | 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_12702 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Imaging of Antiferroelectric Dark Modes in an Inverted Plasmonic Lattice 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 Optics Mesoscale and Nanoscale Physics 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. |
| title | Imaging of Antiferroelectric Dark Modes in an Inverted Plasmonic Lattice |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2401.12702 |