Dynamic long range interaction induced topological edge modes in dispersive gyromagnetic lattices

Raymond P.H. Wu, Yongliang Zhang, K. F. Lee, Jin Wang, S. F. Yu, Kin Hung Fung (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


We study the dynamic long range interaction induced topological photonic bands and edge modes in a one-dimensional (1D) array of strongly dispersive gyromagnetic resonant cylinders. We propose a 1D topological model for such a dispersive gyromagnetic system and demonstrate that the dynamic long-range interaction can lead to localized topological edge modes, while the quasistatic interaction alone does not. Different from the conventional Su-Schrieffer-Heeger model that has only nearest-neighbor interactions, we find that the normal modes of the system coupled strongly to the photon mode of the background medium and the dynamic effects create a different band gap. Our results indicate the importance of the dynamic long-range interactions on the band structures and topological edge modes in strongly dispersive gyromagnetic systems.

Original languageEnglish
Article number214433
JournalPhysical Review B
Issue number21
Publication statusPublished - 24 Jun 2019

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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