Programmable elastic valley Hall insulator with tunable interface propagation routes

Quan Zhang, Yi Chen, Kai Zhang, Gengkai Hu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

98 Citations (Scopus)

Abstract

A challenge in the area of topologically protected edge waves in elastic media is how to tune the topological interface propagation route as needed. This paper proposes a tunable elastic valley Hall insulator, whose unit cell consists of two cavities and magnetic fluid with the same volume as the cavity. Interface route with arbitrary shape for propagating topologically protected edge waves can be achieved by controlling the distribution of magnetic fluid in each unit cell through a designed programmable magnet lifting array. As demonstrated through numerical simulations and experimental testing, the flexural wave is confined to propagate along the topological interface routes of different configurations. Finally, it is indicated that the proposed valley Hall insulator can be applied to achieve desired localized elastic energy which is robust to defects, sharp corners and so on.

Original languageEnglish
Pages (from-to)76-80
Number of pages5
JournalExtreme Mechanics Letters
Volume28
DOIs
Publication statusPublished - Apr 2019

Keywords

  • Elastic topological insulator
  • Programmable interface propagation route
  • Topologically protected edges wave
  • Wave guiding

Fingerprint

Dive into the research topics of 'Programmable elastic valley Hall insulator with tunable interface propagation routes'. Together they form a unique fingerprint.

Cite this