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Updated: Jun 19, 2026

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
Published on: June 28, 2024
Radial wave crystals: radially periodic structures from anisotropic metamaterials for engineering acoustic or
Daniel Torrent1, José Sánchez-Dehesa
1Wave Phenomena Group, Department of Electronic Engineering, Polytechnic University of Valencia, E-46022 Valencia, Spain.
Abstract:
We demonstrate that metamaterials with anisotropic properties can be used to develop a new class of periodic structures that has been named radial wave crystals. They can be sonic or photonic, and wave propagation along the radial directions is obtained through Bloch states like in usual sonic or photonic crystals. The band structure of the proposed structures can be tailored in a large amount to get exciting novel wave phenomena. For example, it is shown that acoustical cavities based on radial sonic crystals can be employed as passive devices for beam forming or dynamically orientated antennas for sound localization.
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