Elastic Metamaterials with Simultaneously Negative Effective Shear Modulus and Mass Density
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AbstractWe propose a type of elastic metamaterial comprising fluid-solid composite inclusions which can possess a negative shear modulus and negative mass density over a large frequency region. Such a material has the unique property that only transverse waves can propagate with a negative dispersion while longitudinal waves are forbidden. This leads to many interesting phenomena such as negative refraction, which is demonstrated by using a wedge sample and a significant amount of mode conversion from transverse waves to longitudinal waves that cannot occur on the interface of two natural solids.
CitationElastic Metamaterials with Simultaneously Negative Effective Shear Modulus and Mass Density 2011, 107 (10) Physical Review Letters
PublisherAmerican Physical Society (APS)
JournalPhysical Review Letters