Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Silicon slot metasurface supporting a multitude of bound states in the continuum: theoretical and experimental studies
Δημιουργός/Συγγραφέας:	Nousios, G. Algorri, J.F. Fuscaldo, W. Dell’Olio, F. Romano, S. Zito, G. Miranda, B. Ding, Y. Dmitriev, V. Andreani, L.C. Galli, M. [EL] Τσιλιπάκος Οδυσσέας[EN] Tsilipakos, Odysseas Kriezis, E.E. Zografopoulos, D.C.
Ημερομηνία:	2025
Γλώσσα:	Αγγλικά
ISSN:	00303992
DOI:	10.1016/j.optlastec.2025.113398
Περίληψη:	A dielectric metasurface supporting a variety of quasi-bound states in the continuum (qBICs), including the intricate 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 corroborated 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.
Τίτλος πηγής δημοσίευσης:	Optics & Laser Technology
Τόμος/Κεφάλαιο:	192
Θεματική Κατηγορία:	[EL] Νανοτεχνολογία[EN] Nanotechnology [EL] Εφαρμοσμένη οπτική. Φωτονική[EN] Applied optics. Photonics [EL] Φυσική[EN] Physics
Λέξεις-Κλειδιά:	Silicon metasurfaces Bound states in the continuum Nanofabrication Multipole analysis Metasurface lasers Nonlinear nanophotonics
Χρηματοδότης:	Italian Ministry of University and Research
Χρηματοδοτικό πρόγραμμα:	PRIN-2022 ALPHA “ALl-dielectric resonant metasurfaces enhancing PHoton emission phenomenA”
Αναγνωριστικό χρηματοδοτικού προγράμματος:	CUP:D53D23001060006
Κάτοχος πνευματικών δικαιωμάτων:	© 2025 The Author(s). Published by Elsevier Ltd.
Όροι και προϋποθέσεις δικαιωμάτων:	This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1016/j.optlastec.2025.113398
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο