期刊
CHINESE PHYSICS B
卷 26, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/26/11/114304
关键词
acoustic focusing; Airy beam; phase manipulation; cavity structure
资金
- National Natural Science Foundation of China [11774137, 11404147]
- Major Program of the National Natural Science Foundation of China [51239005]
- Natural Science Foundation of Jiangsu Province, China [BK20140519, BK20140523]
- Jiangsu Qing Lan Project, China
- Practice Innovation Training Program Projects for Industrial Center of Jiangsu University, China
We realize broadband acoustic focusing effect by employing two symmetric Airy beams generated from phased arrays, in which the units of the phased arrays consist of different numbers of cavity structures, each of which is composed of a square cavity and two inclined channels in air. The exotic phenomenon arises from the energy overlapping of the two symmetric Airy beams. Besides, we demonstrate the focusing performance with high self-healing property, and discuss the effects of structure parameters on focusing performance, and present the characteristics of the cavity structure with straight channels. Compared with other acoustic lenses, the proposed acoustic lens has advantages of broad bandwidth (about 1.4 kHz), high self-healing property of focusing performance, and free adjustment of focal length. Our finding should have great potential applications in ultrasound imaging and medical diagnosis.
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