Titre :

Bulk elastic waves with unidirectional backscattering-immune topological states in a time-dependent superlattice

Auteur(s) :

Swinteck, N. [Auteur]
Matsuo, S. [Auteur]
Runge, K. [Auteur]
Vasseur, Jerome O. [Auteur]
Acoustique - IEMN [ACOUSTIQUE - IEMN]
Lucas, P. [Auteur]
Deymier, P. [Auteur]

Titre de la revue :

Journal of Applied Physics

Pagination :

063103

Éditeur :

American Institute of Physics

Date de publication :

2015

ISSN :

0021-8979

Mot(s)-clé(s) en anglais :

Geometric topology
Telecommunications engineering
Bloch wave
String theory
Topological insulator
Wave mechanics
Crystal structure
Superlattices
Elastic waves
Electronic band structure

Discipline(s) HAL :

Physique [physics]/Mécanique [physics]/Acoustique [physics.class-ph]

Résumé en anglais : [en]

Recent progress in electronic and electromagnetic topological insulators has led to the demonstration of one way propagation of electron and photon edge states and the possibility of immunity to backscattering by edge ...
Lire la suite >Recent progress in electronic and electromagnetic topological insulators has led to the demonstration of one way propagation of electron and photon edge states and the possibility of immunity to backscattering by edge defects. Unfortunately, such topologically protected propagation of waves in the bulk of a material has not been observed. We show, in the case of sound/elastic waves, that bulk waves with unidirectional backscattering-immune topological states can be observed in a time-dependent elastic superlattice. The superlattice is realized via spatial and temporal modulation of the stiffness of an elastic material. Bulk elastic waves in this superlattice are supported by a manifold in momentum space with the topology of a single twist Möbius strip. Our results demonstrate the possibility of attaining one way transport and immunity to scattering of bulk elastic waves.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL