Topological Bands and Triply Degenerate Points in Non-Hermitian Hyperbolic Metamaterials
Topological Bands and Triply Degenerate Points in Non-Hermitian Hyperbolic Metamaterials
Hyperbolic metamaterials (HMMs), an unusual class of electromagnetic metamaterials, have found important applications in various fields due to their distinctive properties. A surprising feature of HMMs is that even continuous HMMs can possess topological edge modes. However, previous studies based on equal-frequency surface (analogy of Fermi surface) may not correctly …