Journal
PHYSICS LETTERS A
Volume 382, Issue 39, Pages 2880-2885Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2018.06.029
Keywords
Topological edge state; Reconfigurability; Lamb wave; Pseudospin-orbit coupling; Robustness
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Funding
- National Science Foundation of China [11374093]
- Young Scholar fund - common university and college of the province in Hunan
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We propose two-dimensional reconfigurable phononic crystal slabs that support topologically protected edge states for Lamb waves. It consists of a triangular lattice of triangular-like air holes perforated in a slab and two sandwich cylinders are placed in the matrix of each unit cell. The pseudospin-orbit coupling is achieved by shifting the sandwich cylinders up or down. The robust transport of Lamb waves along reconfigurable interfaces is further demonstrated. The dynamically reconfigurable design provides an excellent platform for tuning the frequency range of topological edge states and steering efficient transport of Lamb waves along arbitrary pathways, which can be employed for elastic-wave communications, signal processing, and sensing. (C) 2018 Elsevier B.V. All rights reserved.
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