期刊
JOURNAL OF APPLIED PHYSICS
卷 119, 期 20, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4951008
关键词
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资金
- National Natural Science Foundation of China [11174234, 51272215]
- National Key Scientific Program of China [2012CB921503]
We experimentally demonstrate a double-negative acoustic metamaterial (AM) that combines a hollow tube and a split hollow sphere into a structurally simple perforated hollow tube with the ability to generate simultaneous resonances in water. The effective acoustic parameters extracted from the transmission and reflection coefficients confirmed that negative effective mass density and modulus were achieved from 36.68 kHz to 36.96 kHz, and the effective index was also negative in the same frequency range. In addition, further experimental measurements confirmed that the well-designed AM could realize slab focusing phenomenon. With the unique properties, the proposed AM presents potential applications in sub-wavelength imaging and medical ultrasound treatment. Published by AIP Publishing.
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