@article{10902/36934,
year = {2025},
month = {12},
url = {https://hdl.handle.net/10902/36934},
abstract = {A dielectric metasurface supporting a variety of quasi-bound states in the continuum (qBICs), including the in tricate dark toroidal dipole and toroidal quadrupole Mie modes, is theoretically and experimentally investigated in the near-infrared. The metasurface consists of square slots etched into a thin silicon layer and periodically arrayed in a subdiffractive lattice residing on a sapphire substrate. The modal properties of the qBICs, i.e., the quality factors alongside the near- and far-field characteristics, are comprehensively assessed through a set of theoretical tools, including eigenfrequency simulations and multipolar expansion analysis. The results are cor roborated by experimental studies verifying the existence of the qBICs. The investigated metasurface may serve as an ideal platform for nonlinear applications, such as third-harmonic generation, when leveraging the Kerr effect of silicon, as well as for lasing when the slot is filled with a low-index material hosting organic dye molecules.},
organization = {This research work is supported by the project PRIN-2022 ALPHA “ALl-dielectric resonant metasurfaces enhancing PHoton emisión phenomenA” (CUP:D53D23001060006) funded by the Italian Ministry of University and Research.},
publisher = {Elsevier},
publisher = {Optics and Laser Technology, 2025, 192(Part A), 113398},
title = {Silicon slot metasurface supporting a multitude of bound states in the continuum: theoretical and experimental studies},
author = {Nousios, Georgios and Algorri Genaro, José Francisco and Fuscaldo, Walter and Dell'Olio, Francesco and Romano, Silvia and Zito, Gianluigi and Miranda, Bruno and Ding, Yunhong and Dmitriev, Victor and Andreani, Lucio and Galli, Matteo and Tsilipakos, Odysseas and Kriezis, Emmanouil and Zografopoulos, Dimitrios},
}