Please use this identifier to cite or link to this item:
Title: Local resonator stimulated polarization transition in metamaterials and the formation of topological interface states
Authors: Hu, Guobiao
Lan, Chunbo
Tang, Lihua
Yang, Yaowen
Keywords: Engineering::Civil engineering
Issue Date: 2022
Source: Hu, G., Lan, C., Tang, L. & Yang, Y. (2022). Local resonator stimulated polarization transition in metamaterials and the formation of topological interface states. Mechanical Systems and Signal Processing, 165, 108388-.
Journal: Mechanical Systems and Signal Processing
Abstract: Developing the acoustic-elastic analogy of a topological insulator has attracted extensive research attention in recent years. Designs developed in the literature strongly rely on reforming the host structure of a system to achieve topology transition. In this article, an innovative topological metamaterial is presented. Unlike topological phononic crystals, the proposed topological metamaterial has a uniform host structure without any phononic crystal features. The band inversion and polarization transition are achieved by manipulating the design of local resonators. It has been proven that by changing the coupling spring constant of local resonators, the mode topologies at the bound states associated with the band gaps can be converted. Three polarization transition points have been found from the bound evolution analysis, and all of them possess the capability of stimulating topological interface states in the corresponding band gaps. The Zak phase calculations have further ascertained the prediction about the topological interface states. The band structure and transmittance spectrum of a supercell lattice of the proposed topological metamaterial have been examined. The topological interface states, as well as the energy localization effects, have been successfully observed in all the three band gaps. The proposed metamaterial brings the convenience of creating topological interface states by carefully manipulating the local resonators only. The methodology presented in this work is thus of practical significance in transforming existing structures into topological systems without revising them.
ISSN: 0888-3270
DOI: 10.1016/j.ymssp.2021.108388
Schools: School of Civil and Environmental Engineering 
Rights: © 2021 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles

Citations 20

Updated on Sep 30, 2023

Web of ScienceTM
Citations 20

Updated on Oct 1, 2023

Page view(s)

Updated on Oct 3, 2023

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.