期刊
JOURNAL OF APPLIED PHYSICS
卷 117, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4905910
关键词
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资金
- National Basic Research Program of China [2015CB755500]
- National Natural Science Foundation of China [11174225, 11004155, 11374233, J1210061]
- Program for New Century Excellent Talents [NCET-11-0398]
Based on the Huygens-Fresnel principle, we design a planar lens to efficiently realize the interconversion between the point-like sound source and Gaussian beam in ambient air. The lens is constructed by a planar plate perforated elaborately with a nonuniform array of zigzag slits, where the slit exits act as subwavelength-sized secondary sources carrying desired sound responses. The experiments operated at audible regime agree well with the theoretical predictions. This compact device could be useful in daily life applications, such as for medical and detection purposes. (C) 2015 AIP Publishing LLC.
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