Figure 1 | Illustration of the HOTI-type Hinge States in an arbitrary Yang monopole metamaterial (YMM) Cylinder. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 1 | Illustration of the HOTI-type Hinge States in an arbitrary Yang monopole metamaterial (YMM) Cylinder.

Caption

Figure 1 | Illustration of the HOTI-type Hinge States in an arbitrary Yang monopole metamaterial (YMM) Cylinder. (a) Illustration of the 1D Weyl arc connecting projections of Yang monopoles with opposite c2, on a 4D boundary normal to the x-direction. The right inset depicts the local Weyl dispersion of surface states at a given kz. (b) Localized HOTI-type hinge states on the side boundary of a 3D cylinder, constructed from a homogeneous electromagnetic medium featuring nontrivial c2 in a synthetic 5D space. (c) Schematic of the intrinsic variation in the effective orientation angle of the bianisotropy vector, along an arbitrary x-y cross-section. The top-right inset illustrates the consistent 2π variation of the normal vector orientation along the perimeter, irrespective of the special shape of the cross section. The bottom-right inset displays the localized energy density field distribution of a representative hinge state, with orange dots indicating the localization positions of all four hinge states along the perimeter.

Credit

He, C., Zhao, L., Zhang, S. et al.

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