Thermoacoustic focusing lens by symmetric Airy beams with phase manipulations
Thermoacoustic focusing lens by symmetric Airy beams with phase manipulations
复制标题
具有相位操纵的对称艾里光束热声聚焦透镜
DOI：
10.1088/1361-6463/aa964a
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发表时间：
2017-11
期刊：
影响因子：
--
通讯作者：
Yuan Shou-qi
中科院分区：
文献类型：
--
作者：
Liu Chen;Xia Jian-ping;Sun Hong-xiang;Yuan Shou-qi
We report the realization of broadband acoustic focusing lenses based on two symmetric thermoacoustic phased arrays of Airy beams, in which the units of thermoacoustic phase control are designed by employing air with different temperatures surrounded by rigid insulated boundaries and thermal insulation films. The phase delays of the transmitted and reflected units could cover a whole 2π interval, which arises from the change of the sound velocity of air induced by the variation of the temperature. Based on the units of phase control, we design the transmitted and reflected acoustic focusing lenses with two symmetric Airy beams, and verify the high self-healing focusing characteristic and the feasibility of the thermal insulation films. Besides, the influences of the bending angle of the Airy beam on the focusing performance are discussed in detail. The proposed acoustic lens has advantages of broad bandwidth (about 4.8 kHz), high focusing performance, self-healing feature, and simple structure, which enable it to provide more schemes for acoustic focusing. It has excellent potential applications in acoustic devices.
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