期刊
PHYSICAL REVIEW B
卷 62, 期 11, 页码 7387-7392出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.62.7387
关键词
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The finite-difference time-domain method is applied to the calculation of dispersion relations of acoustic waves in two-dimensional (2D) phononic lattices, i.e., periodic solid-solid, solid-liquid, and solid-vacuum composites, for which the conventional plane-wave-expansion method fails or converges very slowly. Numerical examples are developed for 2D structures with polyethylene, mercury, and vacuum cylinders forming a square lattice in an aluminum matrix. The implication of the calculated dispersion relations for ultrasound transmission experiments is discussed.
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