ArticleNanophotonics (Berlin, Germany)2022
Dual-band bound states in the continuum based on hybridization of surface lattice resonances.
Article in Nanophotonics (Berlin, Germany), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- Increasing ofNanophotonics (Berlin, Germany) · 2026Article
- Strong coupling of collective optical resonances in dielectric metasurfaces.Light, science & applications · 2025Article
- Dual-band high-Q quasi-BIC metasurface for refractive index sensing.Nanophotonics (Berlin, Germany) · 2025Article
- Substrate-induced hybridization of plasmon modes in the composite nanostructure of nanodisk array/thin film for spectrum modulation.Nanophotonics (Berlin, Germany) · 2024Article
- Si metasurface supporting multiple quasi-BICs for degenerate four-wave mixing.Nanophotonics (Berlin, Germany) · 2024Article
- Observation of tunable accidental bound state in the continuum in silicon nanodisk array.Nanophotonics (Berlin, Germany) · 2024Article
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Abstract
We propose and experimentally demonstrate a novel strategy to achieve dual-band symmetry-protected bound states in the continuum (BICs) in silicon metasurfaces. This strategy is based on the hybridization of Mie surface lattice resonances (SLRs) in periodic silicon bipartite nanodisk arrays, of which the central nanodisk displaced from the center of the unit cell. We show that dual-band electric quadrupole and magnetic dipole BICs can be supported in such a system, and transfer to quasi-BICs with ultrahigh measured quality factors up to 1240 at the Γ point. Taking advantage of the SLR characteristics, we show that the spectral separation and the quality factors of these two quasi-BICs can be conveniently tuned by varying the nanodisk diameter or the lattice period. Making use of these dual-band quasi-BICs, we numerically obtain bulk sensitivities above 480 nm/RIU and high figures of merit up to 1200. We also show that when the central nanodisk is not displaced but has different diameter, the silicon bipartite nanodisk array supports an electric dipole BIC that was referred to as subradiant SLR in the literature. Our work provides a new approach for realizing and tuning dual-band BICs, and the obtained ultrahigh-
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