| Texto completo | |
| Autor(es): |
Algorri, J. F.
;
Dmitriev, V.
;
Hernandez-Figueroa, H. E.
;
Rodriguez-Cobo, L.
;
Dell'Olio, F.
;
Cusano, A.
;
Lopez-Higuera, J. M.
;
Zografopoulos, D. C.
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Optical Materials; v. 147, p. 8-pg., 2023-11-25. |
| Resumo | |
All-dielectric metasurfaces supporting resonant quasi-bound states in the continuum (qBIC) offer an ideal platform for various applications relying on intense light-matter interaction in highly localized and enhanced fields. Here, we propose a dielectric metasurface composed of hollow GaP nanocuboid quadrumers periodically arranged on a silica substrate. The metasurface supports a qBIC resonant mode with an antiferroelectric field configuration, which is very robust to large perturbations of the cuboid structure thanks to its perpendicular electric dipole field profile. The perturbed quadrumer arrangement retains C4v symmetry, thus allowing for polarization-independent optical response for normally incident planewaves. In addition, the resonant mode dispersion is investigated, revealing interesting features, such as low birefringence along the Gamma M contour of the Brillouin zone and very low dispersion for the TM polarization along the Gamma X direction. The metasurface is designed to resonate close to 785 nm, which is highly relevant for Raman spectroscopy, leveraging the strong field enhancement at the interface with the overlayer material. Moreover, its performance as a bulk refractometric sensor is discussed. The proposed dielectric metasurface is promising for emerging photonic phenomena where strong light-matter interaction plays a key role. (AU) | |
| Processo FAPESP: | 21/11380-5 - CPTEn - Centro Paulista de Estudos da Transição Energética |
| Beneficiário: | Luiz Carlos Pereira da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Ciência para o Desenvolvimento |
| Processo FAPESP: | 15/24517-8 - Fotônica para internet de nova geração |
| Beneficiário: | Hugo Enrique Hernández Figueroa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 21/06506-0 - Metasurfaces totalmente dielétricas fortemente ressonantes baseadas em modos quase-escuros e toroidais |
| Beneficiário: | Hugo Enrique Hernández Figueroa |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |