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Enhanced light-matter interaction in a hollow nanocuboid metasurface supporting delocalised quasi-BIC modes

Abstract: The two main problems of dielectric metasurfaces for sensing based on enhanced light-matter interaction are that resonances are mainly localised inside the resonator volume and experimental Q-factors are very limited. We investigate a dielectric metasurface supporting delocalised modes based on quasi-bound states in the continuum (qBICs) to address these issues. The metasurface comprises a periodic array of silicon hollow nanocuboids patterned on a glass substrate. The resonance stems from the excitation of a symmetry-protected qBIC mode, accessed by perturbing the arrangement of the nanocuboid holes. Thanks to the variation of the unit cell with a cluster of 4 hollow nanocuboids, delocalised modes with ultra-high Q-factor are produced.

 Autoría: Algorri J.F., Roldán-Varona P., Rodríguez-Cobo L., López-Higuera J.M., Zografopoulos D.C.,

 Congreso: International Conference on Metamaterials, Photonic Crystals and Plasmonics: META (13ª : 2023 : París

Editorial: META

 Fecha de publicación: 01/06/2023

Nº de páginas: 2

Tipo de publicación: Comunicación a Congreso

ISSN: 2429-1390

Proyecto español: PID2019-107270RB-C21

Autores/as

PABLO ROLDAN VARONA

LUIS RODRIGUEZ COBO

ZOGRAFOPOULOS, DIMITRIOS C.