Topological Robust Corner States of a Two-Dimensional Square Lattice with ${\mathbf{C}}_4$ Symmetry in Fully Coupled Dipolar Arrays

Chen Luo, Xiang Zhou, Hui-Chang Li +3

Higher-order topological insulators(HOTIs) is an exciting topic. We constructed a square lattice dipole arrays, it supports out-of-plane and in-plane modes by going beyond conventi…