期刊
APPLIED PHYSICS LETTERS
卷 97, 期 10, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3488349
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资金
- USA Office of Naval Research [N000140910554]
- Spanish MICIIN [TEC2007-67239, CSD2008-66]
Gradient index sonic lenses based on two-dimensional sonic crystals are here designed, fabricated, and characterized. The index-gradient is achieved in these type of flat lenses by a gradual modification of the sonic crystal filling fraction along the direction perpendicular to the lens axis. The focusing performance is well described by an analytical model based on ray theory as well as by numerical simulations based on the multiple-scattering theory. (c) 2010 American Institute of Physics. [doi:10.1063/1.3488349]
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