Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2696621
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The authors have experimentally studied the radiation of a point acoustic source placed inside a two-dimensional phononic crystal of square lattice. They show that a highly directional radiation with a half-power angular width of 6 degrees can be achieved when operating at the band edge frequency for the phononic crystal. Such combination of a point source and a phononic crystal may serve as highly directional acoustic source in applications. (c) 2007 American Institute of Physics.
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