A recipe for making materials with negative refraction in acoustics

Details A recipe for making materials with negative refraction in acoustics A recipe for making materials with negative refraction in acoustics

2007-10-27

arxiv.org/abs/0710.5221v1

Physics

Mathematical Physics

Scientific paper

10.1016/j.physleta.2007.11.037

A recipe is given for making materials with negative refraction in acoustics, i.e., materials in which the group velocity is directed opposite to the phase velocity. The recipe consists of injecting many small particles into a bounded domain, filled with a material whose refraction coefficient is known. The number of small particles to be injected per unit volume around any point $x$ is calculated as well as the boundary impedances of the embedded particles.

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