Reconfigurable plasmonic hot spots enabled by composite VO2-gold plasmonic antennas
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866910050407153664 |
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| author | Řepa, Rostislav Kabát, Jiří Šikola, Tomáš Křápek, Vlastimil |
| author_facet | Řepa, Rostislav Kabát, Jiří Šikola, Tomáš Křápek, Vlastimil |
| contents | We theoretically investigate the formation of electric and magnetic hot spots with reconfigurable plasmonic antennas. We consider three material systems offering different levels of reconfigurability: gold with the static response, vanadium dioxide which allows for ON/OFF switching, and composite gold-vanadium dioxide material platform which offers a possibility to switch between the electric and magnetic hot spot within a single antenna. Using bowtie and diabolo antennas as a case study, we evaluate optical response functions (scattering and absorption cross-sections, electric and magnetic field enhancement). We demonstrate that the composite material system brings, in addition to enhanced reconfigurability, also novel features of plasmonic antennas, such as strong optical absorption and a joint electric-magnetic hotspot. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_11636 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Reconfigurable plasmonic hot spots enabled by composite VO2-gold plasmonic antennas Řepa, Rostislav Kabát, Jiří Šikola, Tomáš Křápek, Vlastimil Optics We theoretically investigate the formation of electric and magnetic hot spots with reconfigurable plasmonic antennas. We consider three material systems offering different levels of reconfigurability: gold with the static response, vanadium dioxide which allows for ON/OFF switching, and composite gold-vanadium dioxide material platform which offers a possibility to switch between the electric and magnetic hot spot within a single antenna. Using bowtie and diabolo antennas as a case study, we evaluate optical response functions (scattering and absorption cross-sections, electric and magnetic field enhancement). We demonstrate that the composite material system brings, in addition to enhanced reconfigurability, also novel features of plasmonic antennas, such as strong optical absorption and a joint electric-magnetic hotspot. |
| title | Reconfigurable plasmonic hot spots enabled by composite VO2-gold plasmonic antennas |
| topic | Optics |
| url | https://arxiv.org/abs/2603.11636 |