Nondiffractive sonic crystals

Details Nondiffractive sonic crystals Nondiffractive sonic crystals

2006-06-02

arxiv.org/abs/physics/0606018v1

Physics

Fluid Dynamics

7 figures, submitted to J. Acoust. Soc. Am

Scientific paper

We predict theoretically the nondiffractive propagation of sonic waves in periodic acoustic media (sonic crystals), by expansion into a set of plane waves (Bloch mode expansion), and by finite difference time domain calculations of finite beams. We also give analytical evaluations of the parameters for nondiffractive propagation, as well as the minimum size of the nondiffractively propagating acoustic beams.

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