Figure 3
From: Topological electromagnetic waves in dispersive and lossy plasma crystals
Real part of the band structure of magnetized-plasma photonic crystal featuring a Chern insulator gap. (a) Under an external magnetic field of \(B = 0.054\,\text {T}\), a full energy gap is opened (green ribbon), featuring a non-zero Chern number. Meanwhile, the flat bands split into two groups (blue ribbons). (b) Local resonances, labeled by different azimuthal numbers m, are responsible for observed flat bands in (a). Two example mode profiles (\(m=1\) and \(m=-5\)) are shown, both in amplitude (hot color map) and phase (gray-scale). (c) The frequency of local resonances agrees well with the surface plasmon polariton (SPP) dispersion at the interface between air and magnetized plasma.
