Fig. 4: Experimental validation of high Q-factor QBICs in supercell composite metasurfaces with centroid symmetry breaking. | Light: Science & Applications

Fig. 4: Experimental validation of high Q-factor QBICs in supercell composite metasurfaces with centroid symmetry breaking.

From: Robust ultrahigh-Q resonances in tetramer metasurfaces through centroid symmetry protection and area conservation

Fig. 4: Experimental validation of high Q-factor QBICs in supercell composite metasurfaces with centroid symmetry breaking.

a Schematic illustration of QBICs excitation in the supercell device. b, c SEM images of the typical samples, the position offset of one of the circular holes is denoted by δ. d, f Normalized reflection intensity spectra for modes MA1 and MA2, measured experimentally at different δ values. e, g Comparative plots of Q-factors and wavelengths for the two modes, obtained from both experimental data and simulations at varying δ values

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