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arXiv · 2603.11636

Reconfigurable plasmonic hot spots enabled by composite VO2-gold plasmonic antennas

Rostislav Řepa·Jiří Kabát·Tomáš Šikola·Vlastimil Křápek
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Abstract

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.

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Rostislav Řepa, Jiří Kabát, Tomáš Šikola, Vlastimil Křápek. 2026-03-12. Reconfigurable plasmonic hot spots enabled by composite VO2-gold plasmonic antennas. https://arxiv.org/abs/2603.11636

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