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FIG 3

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Fig.3 Generalized high-order hybrid BIC. (a, b) Microscopic images of Ht-BIC and Hq-BIC metasurfaces with three and one asymmetric resonators out of four in a 2×2 supercell, respectively, and the period is 2a along both x and y axes. Scale bar, 20 μm. (c) Schematic diagram of band folding from U-qBIC lattice (black) to Ht-BIC/Hq-BIC (red) in the Brillouin zone. (d) Simulated transmission amplitude spectra of the Ht-BIC (left) and Hq-BIC (right) metasurfaces at asymmetry degree of 2.97%.

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