Charge reservoir as a design concept for plasmonic antennas
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915623910506496 |
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| author | Řepa, Rostislav Horák, Michal Šikola, Tomáš Křápek, Vlastimil |
| author_facet | Řepa, Rostislav Horák, Michal Šikola, Tomáš Křápek, Vlastimil |
| contents | Plasmonic antennas exploit localized surface plasmons to shape, confine, and enhance electromagnetic fields with subwavelength resolution. The field enhancement is contributed to by various effects, such as the inherent surface localization of plasmons or the plasmonic lightning-rod effect. Inspired by nanofocusing observed for propagating plasmons, we test the hypothesis that plasmonic antennas with a large cross-section represent a large charge reservoir, enabling large induced charge and field enhancement. Our study reveals that a large charge reservoir is accompanied by large radiative losses, which are the dominant factor, resulting in a low field enhancement. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_13932 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Charge reservoir as a design concept for plasmonic antennas Řepa, Rostislav Horák, Michal Šikola, Tomáš Křápek, Vlastimil Optics Mesoscale and Nanoscale Physics Plasmonic antennas exploit localized surface plasmons to shape, confine, and enhance electromagnetic fields with subwavelength resolution. The field enhancement is contributed to by various effects, such as the inherent surface localization of plasmons or the plasmonic lightning-rod effect. Inspired by nanofocusing observed for propagating plasmons, we test the hypothesis that plasmonic antennas with a large cross-section represent a large charge reservoir, enabling large induced charge and field enhancement. Our study reveals that a large charge reservoir is accompanied by large radiative losses, which are the dominant factor, resulting in a low field enhancement. |
| title | Charge reservoir as a design concept for plasmonic antennas |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2511.13932 |