期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.124301
关键词
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资金
- Spanish MICINN [MAT2010-14885]
- European Commission [FP7-ICT-2009-4-248909-LIMA, FP7-ICT-2009-4-248855-N4E]
- Danish Council for Independent Research (Natural Sciences) [10-093234]
- Leverhulme Trust
- EPSRC [EP/G060363/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G060363/1] Funding Source: researchfish
We study a class of acoustic metamaterials formed by layers of perforated plates and producing negative refraction and backward propagation of sound. A slab of such material is shown to act as a perfect acoustic lens, yielding images with subwavelength resolution over large distances. Our study constitutes a nontrivial extension of similar concepts from optics to acoustics, capable of sustaining negative refraction over extended angular ranges, with potential application to enhanced imaging for medical and detection purposes, acoustofluidics, and sonochemistry.
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