Topological elastic interface states in hyperuniform pillared metabeams

Cai, Runcheng; Pennec (Admin), Yan; Carpentier, Laurent; Jin, Yabin; Rabczuk, Timon; Zhuang, Xiaoying; Djafari-Rouhani, Bahram

Document type :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1063/5.0184699

Title :

Topological elastic interface states in hyperuniform pillared metabeams

Author(s) :

Cai, Runcheng [Auteur]
Tongji University
Pennec (Admin), Yan [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]
Carpentier, Laurent [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]
Jin, Yabin [Auteur]
Tongji University
Rabczuk, Timon [Auteur]
Bauhaus-Universität Weimar
Zhuang, Xiaoying [Auteur]
Tongji University
Djafari-Rouhani, Bahram [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]

Journal title :

Apl Materials

Pages :

011121

Publisher :

AIP Publishing

Publication date :

2024

ISSN :

2166-532X

HAL domain(s) :

Physique [physics]/Matière Condensée [cond-mat]

English abstract : [en]

Topological states have been receiving a great deal of interest in various wave problems, such as photonic, acoustic, and elastic waves. However, few studies of topological elastic waves in non-periodic systems have been ...
Show more >Topological states have been receiving a great deal of interest in various wave problems, such as photonic, acoustic, and elastic waves. However, few studies of topological elastic waves in non-periodic systems have been reported. Recently, hyperuniform systems suppressing long-range order while partly maintaining short-range order have provided new opportunities to control waves. In this work, we study the elastic topological interface states appearing between two Su–Schrieffer–Heeger (SSH)-like pillared metabeams where each metabeam, is constituted by a mirror symmetric hyperuniform structure. The SSH-like model is constructed by combining two hyperuniform metabeams with inverted configurations. We demonstrate that this structure could open new bandgaps at low frequencies, of which some are nontrivial and can support topological interface modes. We further show that the number of low-frequency bandgaps supporting the topological modes increases with the level of randomness, hence providing a high number of interface modes in the same structure. The robustness of the topological interface states against random perturbations in the pillars’ positions is further verified. Our work offers a reliable platform for studying topological properties and hyperuniform metamaterials and designing wave control devices for low-frequency wave attenuation and robust energy localization.Show less >

Language :

Anglais

Popular science :

Non

ANR Project :

Surface PhoXonique Aléatoire

Collections :