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Topological guiding of elastic waves in phononic metamaterials based on 2D pentamode structures.

ABSTRACT: A topological state with protected propagation of elastic waves is achieved by appropriately engineering a phononic metamaterial based on 2D pentamode structures in silicon. Gapless edge states in the designed structure, which are characterized by pseudospin-dependent transport, provide backscattering-immune propagation of the elastic wave along bend paths. The role of the states responsible for forward and backward transfer can be interchanged by design.

SUBMITTER: Guo Y

PROVIDER: S-EPMC5741736 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Topological guiding of elastic waves in phononic metamaterials based on 2D pentamode structures.

Guo Yuning Y Dekorsy Thomas T Hettich Mike M

Scientific reports 20171222 1

A topological state with protected propagation of elastic waves is achieved by appropriately engineering a phononic metamaterial based on 2D pentamode structures in silicon. Gapless edge states in the designed structure, which are characterized by pseudospin-dependent transport, provide backscattering-immune propagation of the elastic wave along bend paths. The role of the states responsible for forward and backward transfer can be interchanged by design. ...[more]

PMID: 29273741

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