Answers are grounded in this paper and cite their sources.
We study the dispersion relation of a metamaterial composed of metallic disks and bars arranged to have kagom\'e symmetry and find that a plasmonic flat band is formed by the topological nature of the kagom\'e lattice. To confirm the flat-band formation, we fabricate the metamaterial and make transmission measurements in the terahertz regime. Two bands formed by transmission minima that depend on the polarization of the incident terahertz beams are observed. One of the bands corresponds to the flat band, as confirmed by the fact that the resonant frequency is almost independent of the incident angle.
No takes yet. Share an insight, caveat, or question.
Nakata et al. (2012) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: