Antisymmetric toroidal plasmonic metasurfaces

Yingying Yu; Bo Sun; Wenxing Yang

doi:10.1117/12.3016267

1 February 2024 Antisymmetric toroidal plasmonic metasurfaces

Yingying Yu, Bo Sun, Wenxing Yang

Proceedings Volume 13068, Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023); 130681U (2024) https://doi.org/10.1117/12.3016267
Event: Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023), 2023, Hefei, China

Abstract

In this work, we propose a plasmonic metasurfaces, whose unit cell consisted of a pair of physically connected asymmetric split-ring resonators. Antisymmetric toroidal dipole array is excited. Moreover, toroidal dipoles and hybrid pseudo-anapole states are excited due to the imperfect and perfect destructive interference, respectively. By adjusting the relative position between two toroidal dipoles of the metasurfaces, the imperfect destructive interference was further modified. In addition, this work studied the sensing performance of the metasurface. The displacement sensitivity is around 0.13GHz/mm over the range of 0-8mm. The sensitivity to the refractive index reached up to 3.125GHz/RIU over the range of 1-2. The proposed plasmonic metasurfaces can be the foundation for developing highly sensitivity sensors, frequency-selective surface, active modulation, filter and many other areas.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yingying Yu, Bo Sun, and Wenxing Yang "Antisymmetric toroidal plasmonic metasurfaces", Proc. SPIE 13068, Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023), 130681U (1 February 2024); https://doi.org/10.1117/12.3016267

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KEYWORDS

Magnetism

Plasmonics

Refractive index

Destructive interference

Electric fields

Electromagnetic metamaterials

Sensors

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