2026/07/01 by Y Chen, Yousi 幼思 Chen 陈, Shangxian Du +11
Materials Science · Physics and Astronomy · #Metamaterials and Metasurfaces Applications #Photonic Crystals and Applications #Topological Materials and Phenomena
paper · pdf · doi:10.1088/0256-307x/43/7/070401
openalex publication_date 2026/07/01 · openalex created_date 2026/07/09 · openalex updated_date 2026/07/29
Abstract The chiral edge states in the Haldane model and the antichiral edge states in the modified Haldane model have been extensively studied, revealing intriguing transport properties. In this work, the frequency-dependent spatial regulation of chiral and antichiral edge states is investigated in gyromagnetic photonic crystals through sublattice modulation. The unequal magnetization intensity on two-type sublattices, breaking the inversion symmetry, leads to the shift of the chiral edge state dispersions and the lifting of the degenerate antichiral edge states. Through simulations and experiments, we demonstrate that, under sublattice modulation, the transport efficiency of chiral and antichiral edge states at different edges is actively controlled, breaking through the functional limitations of conventional models. Based on this mechanism, a multi-channel waveguide is proposed, providing a new path for the functional innovation and system integration of topological photonic devices.