Lossless and loss-induced topological transitions of isofrequency surfaces of a composite magnetic-semiconductor medium

Abstract

Topological transitions of isofrequency surfaces of a composite magnetic-semiconductor structure influenced by an external static magnetic field are studied in the long-wavelength approximation. For the lossless case, the topological transitions of isofrequency surfaces from a closed ellipsoid to open Type I and Type II hyperboloids as well as a bi-hyperboloid are demonstrated. Conditions for critical points where the topological transitions occur are found out. It is revealed that actual material losses in the constituents of the composite medium strongly influence the dispersion behaviours for the extraordinary waves, which manifest themselves in the loss-induced topological transitions of isofrequency surfaces. It is shown that the loss-induced topological transitions from a Type I hyperboloid to a bi-hyperboloid appear in the frequency band where the real part of a particular principal component of the anisotropic constitutive parameter (permittivity or permeability tensor) is a near-zero value while its imaginary part is a non-zero value.

9 pages, 8 figures

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• Magnetic hyperbolic metamaterial of polaritonic nanowires
• Dispersion features of complex waves in a graphene-coated semiconductor nanowire
• Bi-hyperbolic isofrequency surface in a magnetic-semiconductor superlattice
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• The Inverse Problem of Quartic Photonics

Cited by in corpus (5)

• Hyperbolic Metamaterials: From Dispersion Manipulation to Application
• Photonic Chern insulators made of gyromagnetic hyperbolic metamaterials
• Magnetically induced topological transitions of hyperbolic dispersion in biaxial gyrotropic media
• Spin-governed topological surfaces and broken spin-momentum locking in a gyromagnetic medium
• Abnormal wave propagation of high-k modes in tilted linear-crossing metamaterials