Negative effective mass below a cut-off frequency

Details Negative effective mass below a cut-off frequency Negative effective mass below a cut-off frequency

2010-01-06

arxiv.org/abs/1001.0839v2

New Journal of Physics 12 (2010) 103025

Physics

Classical Physics

This paper has been withdrawn by the authors. New Journal of Physics 12 (2010) 103025

Scientific paper

Negative mass phenomena occurring below a cut-off frequency is examined by both theoretical and experimental methods. The paper begins with the investigation on a mass-spring structure, the effective mass of which is shown to be negative below a specific frequency. Due to the decaying nature of lattice waves in the negative-mass system, the transmission drop induced by negative effective mass is demonstrated experimentally. Further investigation is conducted for a rectangular solid waveguide with clamped boundary conditions. It is shown that the lowest bandgap mode of the clamped waveguide can be attributed to negative effective mass below a cut-off frequency. Based on this observation, elastic metamaterials made of the steel grid filled by styrene butadiene rubber are designed and fabricated. Both simulation and experimental analyses demonstrate that the designed metamaterial have negative effective mass below a cut-off frequency.

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