Topological properties of bound states in the continuum in geometries with broken anisotropy symmetry
Topological properties of bound states in the continuum in geometries with broken anisotropy symmetry
Waveguiding structures made of anisotropic media support bound states in the continuum (BICs) that arise when the radiation channel of otherwise semi-leaky modes is suppressed. Hitherto, only structures with optical axes aligned in symmetric orientations inside the waveguide plane, where BICs appear as lines in the momentum-frequency dispersion diagram, have …