Elastic metamaterials with simultaneously negative effective shear modulus and mass density
We 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...
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| Published in | Physical review letters Vol. 107; no. 10; p. 105506 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
02.09.2011
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| Online Access | Get more information |
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| Summary: | We 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. |
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| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.107.105506 |