Journal of Jishou University(Natural Sciences Edition)

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Double Negative Acoustic Metamaterials Based on a Soft Slid Plate and Hollow Steel Cylinders

DENG Ke,SONG Zonggen,ZHAO Heping   

  1. (College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China)
  • Online:2016-03-25 Published:2016-05-11


A water-immersed epoxy plate injected with periodical steel columns is designed to achieve negative-dynamic-mass response,which arises from the collective excitation of surface modes in the plate.A slit hollow steel cylinder immersed in water is designed as a Helmholtz resonator to achieve negative bulk modulus.By combining these two designed structures together,an acoustic metamaterial simultaneously possessing a negative mass density and bulk modulus is realized.Compared to previous realized three-dimensional double negative metamaterials,this two-dimensional double negative metamaterial is much easy to be fabricated.

Key words: acoustic metamaterials, negative mass density, negative bulk modulus

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