| Autor: |
Huaijun Chen, Hui Li, Shilong Zhai, Changlin Ding, Jiamao Li, Chunrong Luo, Xiaopeng Zhao |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 5/28/2016, Vol. 119 Issue 20, p204902-1-204902-8, 8p, 3 Diagrams, 4 Graphs |
| Abstrakt: |
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 welldesigned AM could realize slab focusing phenomenon. With the unique properties, the proposed AM presents potential applications in sub-wavelength imaging and medical ultrasound treatment. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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