Title :

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

Author(s) :

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

Journal title :

Journal of Applied Physics

Pages :

063103

Publisher :

American Institute of Physics

Publication date :

2015

ISSN :

0021-8979

English keyword(s) :

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

HAL domain(s) :

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

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

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

Source :

Harvested from HAL