| Issue |
EPJ Web Conf.
Volume 287, 2023
EOS Annual Meeting (EOSAM 2023)
|
|
|---|---|---|
| Article Number | 04020 | |
| Number of page(s) | 2 | |
| Section | Topical Meeting (TOM) 4- Nanophotonics | |
| DOI | https://doi.org/10.1051/epjconf/202328704020 | |
| Published online | 18 October 2023 | |
https://doi.org/10.1051/epjconf/202328704020
Robust all-dielectric high Q-factor metasurface for sensing
1 School of Physics and AMBER, Trinity College Dublin, College Green, Dublin 2, Ireland
2 IPIC, Tyndall National Institute, Cork, T12 R5CP, Ireland
* Corresponding author: mccormoi@tcd.ie
Published online: 18 October 2023
All-dielectric metasurfaces have seen a recent surge of interest as an alternative to plasmonic devices, due to low losses and desirable optical properties. High Q-factor quasi-bound state in the continuum resonances can be manufactured and manipulated via designed asymmetry in the nanostructures. The presented metasurface design, based on a slotted disk nanostructure, produces strong E-Field enhancement with good surface coverage external to the structure. The design transition from structure-in-air to structure-on-substrate in a water-based sensing medium is presented, along with the robust tunability and multiplexing potential of our fabricated resonances. Our structure maintains a high Q-factor and refractive index sensitivity over a wide wavelength range in the visible and near-IR.
© The Authors, published by EDP Sciences, 2023
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