Quasi isotropic underwater acoustic carpet cloak based on latticed pentamode metafuid

Abstract

In this work, we present a practical design of quasi isotropic underwater acoustic carpet cloak with pentamode microstructure. The quasi conformal transformation is not only used to obtain the required parameters, but also used to deform the retrieved regular pentamode material structure to the desired carpet, during which the effective parameters can be considered as not being affected too much. The nice and broadband cloak effect shows the success of the design. This work will contribute to the experimental demonstration of pentamode acoustic carpet cloak. Moreover, the technique in this work also can be used to design arbitrarily shaped devices with microstructures.

arXiv comment6 figures

References in corpus (10)

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• Cloaking strategy for Love waves
• Rayleigh surface waves of extremal elastic materials
• Topology optimization of pentamode metamaterials for underwater acoustics
• Extremal micropolar materials for elastic wave cloaking
• Classification of rotational zero modes in 2D micropolar solids