期刊
JOURNAL OF APPLIED PHYSICS
卷 112, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4752468
关键词
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资金
- National Science Foundation (CMMI) [0926776]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [926776] Funding Source: National Science Foundation
One of the outstanding challenges in phononic crystals and acoustic metamaterials development is the ability to tune their performance without requiring structural modifications. We report on the experimental demonstration of a tunable acoustic waveguide implemented within a two-dimensional phononic plate. The waveguide is equipped with a periodic array of piezoelectric transducers which are shunted through passive inductive circuits. The resonance characteristics of the shunts lead to strong attenuation and to negative group velocities at frequencies defined by the circuits' inductance. The proposed waveguide illustrates the concept of a controllable acoustic logic port or of an acoustic metamaterial with tunable dispersion characteristics. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4752468]
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