WebAbstract. We show that the photonic crystal (PhC) made of dielectric cuboids with their centers forming a honeycomb lattice is characterized by a ℤ 2 topological index when the longer sides of six cuboids point towards the center of hexagonal unit cell. While the C 6v symmetry regarding the center of unit cell is preserved, the C 3 symmetry regarding … Webthere is only one band. the band structure is not periodic in k -space. i.e., the Brillouin zone is infinite in k -space. Within the nearly free electron model we start from the dispersion relation of free electrons and analyze the …
Photonic flat-band lattices and unconventional light localization
WebWe study self-localized second-band vortex states in two-dimensional photonic lattices and find stable ring solitons whose phase forms an array of counterrotating vortices. We also … WebBeam-type periodic materials with high connectivity have displayed unique band gap behaviors analogous to locally resonant band gaps in acoustic metamaterials. In this … cheetah bed sheets
Water Free Full-Text Tuning the Optical Properties of ZnO by Co …
WebStrong interactions which are achievable in optical lattice experiments also lead to interesting orbital physics. Firstly, with strongly repulsive bosons loaded into higher … Web10 apr. 2024 · We investigated the electronic structure of the antiferromagnetic Kondo lattice CePd5Al2 using high-resolution angle-resolved photoemission spectroscopy. The experimentally determined band structure of the conduction electrons is predominated by the Pd 4d character. It contains multiple hole and electron Fermi pockets, in good … Weba) Representation of the BBH model as a lattice model with a four-atom unit-cell and nearest-neighbor hopping. With fourfold rotation symmetry R 4 the model exhibits zero-energy corner states in the presence of P or C . b ) These corner states are intrinsic: They cannot be removed by an R 4 -compatible change of boundary termination. cheetah bedding collections