Localized surface plasmons in a Weyl semimetal nanosphere
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866911132651880448 |
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| author | Pellegrino, Francesco M. D. Buccheri, Francesco Angilella, G. G. N. |
| author_facet | Pellegrino, Francesco M. D. Buccheri, Francesco Angilella, G. G. N. |
| contents | In this study, we investigate the localized surface plasmon modes of a sub-wavelength spherical nanoparticle composed of a Weyl semimetal, taking into account the axion modification of electrodynamics. We derive analytical solutions for dipole and quadrupole normal modes by employing the quasistatic approximation. The axion term leads to modified Fröhlich conditions, resulting in multiple non-degenerate plasmonic resonances with distinct polarization dependencies. In contrast to isotropic conventional metals, the magnetoelectric properties of Weyl semimetals enable an incident electromagnetic field, with the electric field transverse to the surface of the sphere, to excite a localized surface plasmon. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_23626 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Localized surface plasmons in a Weyl semimetal nanosphere Pellegrino, Francesco M. D. Buccheri, Francesco Angilella, G. G. N. Mesoscale and Nanoscale Physics Applied Physics Optics In this study, we investigate the localized surface plasmon modes of a sub-wavelength spherical nanoparticle composed of a Weyl semimetal, taking into account the axion modification of electrodynamics. We derive analytical solutions for dipole and quadrupole normal modes by employing the quasistatic approximation. The axion term leads to modified Fröhlich conditions, resulting in multiple non-degenerate plasmonic resonances with distinct polarization dependencies. In contrast to isotropic conventional metals, the magnetoelectric properties of Weyl semimetals enable an incident electromagnetic field, with the electric field transverse to the surface of the sphere, to excite a localized surface plasmon. |
| title | Localized surface plasmons in a Weyl semimetal nanosphere |
| topic | Mesoscale and Nanoscale Physics Applied Physics Optics |
| url | https://arxiv.org/abs/2505.23626 |