| Issue |
EPJ Web Conf.
Volume 335, 2025
EOS Annual Meeting (EOSAM 2025)
|
|
|---|---|---|
| Article Number | 05009 | |
| Number of page(s) | 2 | |
| Section | Topical Meeting - Nanophotonics | |
| DOI | https://doi.org/10.1051/epjconf/202533505009 | |
| Published online | 22 September 2025 | |
https://doi.org/10.1051/epjconf/202533505009
Outstanding Transmittance through Over-Wavelength-Thick Optical Plasmonic Microcavities
iMATUS, NaFoMat, Departamento de Física Aplicada, Universidade de Santiago de Compostela, Rúa Xosé María Suárez Núñez, s/n, 15782 Santiago de Compostela, A Coruña, España
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 22 September 2025
Abstract
This work models light transmission through metal-dielectric-metal microcavities supporting Coupled Surface Plasmons (CSP). An extended Fabry-Pérot formula reveals two plasmonic resonances that merge beyond a critical cavity thickness. Remarkably, transmittance at these resonances remains high and nearly constant for thicknesses exceeding the light's penetration depth. Results at a 1 μm wavelength show over 10% transmittance up to 3.5 μm, offering new insights for photonic device design
© The Authors, published by EDP Sciences, 2025
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