Mobius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge flux.

ABSTRACT: The presence of π gauge flux enabled by positive and negative hopping amplitude can lead to Möbius bands, which was recently demonstrated in both realistic acoustic and photonic lattices, twisted at k = π. Here, we show that the artificial gauge flux configuration can be achieved by exploiting the interactions between photonic s and p orbital-like fundamental modes in circular and peanut-shaped waveguides, respectively. By manipulating the interplay between the gauge fields and the crystal symmetry, we show that breaking the primitive translation symmetry through lattice site dimerization and deformation can cause the original Dirac semimetal phase, characterized by a four-fold Dirac point at the Brillouin zone center, to transform into various topologica

SUBMITTER: Liu Z 

PROVIDER: S-EPMC11501785 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature