| Texto completo | |
| Autor(es): |
Roggero, Ursula F. S.
;
Rojas-Bejarano, Carlos J.
;
Herreno-Fierro, Cesar A.
;
Seifert, Andreas
;
Garcia-Etxarri, Aitzol
;
Hernandez-Figueroa, Hugo E.
;
Zapata-Herrera, Mario
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Optics Express; v. 33, n. 14, p. 14-pg., 2025-07-14. |
| Resumo | |
In this study, localized surface plasmon resonances and diffractive coupling effects in periodic arrays of gold nanoparticles, which give rise to surface lattice resonances, were systematically explored. Using the finite element method simulations in COMSOL Multiphysics, we analyzed how nanoparticle geometry and lattice configuration affected the quality factor and sensitivity. Compared to isolated nanoparticles, periodic arrays of nanospheres, nanodisks, and nanorods exhibited significantly enhanced sensing capabilities due to diffractive coupling, achieving quality factors an order of magnitude higher and bulk sensitivity improvements exceeding 100 nm/RIU. This article confirms experimentally the emergence of hybrid spectral features in such periodic arrays, resulting in narrower resonances and enhanced sensing performance. A proof-of-concept sensor based on a 600-nm periodic gold nanodisk array demonstrates reliable sensitivity, validating that even simple geometries can achieve high performance by harnessing the collective effects of periodicity. These findings emphasize the strong potential of gold nanoparticle arrays in high-performance sensing applications empowered by surface lattice resonances. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement (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: | 22/11596-0 - EMU científico: aquisição de equipamentos de transmissão e caracterização para enlaces de dados em altíssima velocidade |
| Beneficiário: | Darli Augusto de Arruda Mello |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Infraestrutura - Científico |
| Processo FAPESP: | 21/00199-8 - Redes e serviços inteligentes rumo 2030 (SMARTNESS) |
| Beneficiário: | Christian Rodolfo Esteve Rothenberg |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Centros de Pesquisa Aplicada |