Fig. 2: Centroid symmetry breaking excitation of QBIC modes. | Light: Science & Applications

Fig. 2: Centroid symmetry breaking excitation of QBIC modes.

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

Fig. 2: Centroid symmetry breaking excitation of QBIC modes.

a Schematic representations of tetramer supercells featuring various nanohole geometries. b, c The Q-factors and wavelengths of the two BIC modes as a function of increasing radius R2 of the circular hole, accompanied by corresponding eigenfield illustrations. d A schematic diagram illustrating the supercell configuration when one of the circular holes experiences a relative positional shift. e, f Variation in Q-factors and wavelengths for the two QBIC modes with respect to offset δ, the inset displays the magnetic field distribution associated with excited quasi-BICs

Back to article page