English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We describe novel topological phases of isofrequency k‐space surfaces in bianisotropic optical materials—tri‐ and tetrahyperbolic materials—which are induced by the introduction of chirality. This completes the classification of isofrequency topologies for bianisotropic materials, as we showed that all optical materials belong to one of the following topological classes—tetra‐, tri‐, bi‐, mono‐, or nonhyperbolic. We showed that phase transitions between these classes occur in the k‐space directions with zero group velocity at high k‐vectors. This classification is based on the sets of high‐k polaritons (HKPs), supported by materials. We obtained the equation describing these sets and characterized the longitudinal polarization‐impedance of HKPs.

Tri- and Tetrahyperbolic Isofrequency Topologies Complete Classification of Bianisotropic Materials