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- W4220796218 abstract "Abstract Bound states in the continuum (BICs) are localized states despite in a radiation continuum, rendering the ultra-high quality factor for enhanced light-matter interactions and supporting exotic topological properties. So far, most of studied BICs in photonic crystal slabs are only vertically localized, i.e., allowing propagations in the plane of slab but forbidding radiations, and their density of optical states (DOS) is limited due to the steep dispersion characteristics. Here, we report a BIC existing on a flatband of symmetry-broken photonic crystal slab. The flatband, associated with largely reduced group velocity, significantly sharpens the DOS at BICs, which can be robustly realized via finely controlling broken vertical symmetry in the photonic crystal slab. The effect of broken symmetry is revealed in a simple effective Hamiltonian near the second-order Γ point of such system. Our results show the simultaneous engineering of dispersion and leaky characteristics of modes, offering new opportunities to boost light-matter interactions and to enhance the performance of photonic devices." @default.
- W4220796218 created "2022-04-03" @default.
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- W4220796218 date "2022-03-15" @default.
- W4220796218 modified "2023-10-16" @default.
- W4220796218 title "Bound states in the continuum on flatbands of symmetry-broken photonic crystal slabs" @default.
- W4220796218 doi "https://doi.org/10.1088/2040-8986/ac5dd6" @default.
- W4220796218 hasPublicationYear "2022" @default.
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