Acoustic focusing by symmetrical self-bending beams with phase modulations
Acoustic focusing by symmetrical self-bending beams with phase modulations
复制标题
通过相位调制的对称自弯曲光束进行声学聚焦
DOI：
10.1063/1.4941992
复制
发表时间：
2016-02-15
影响因子：
4
通讯作者：
Cheng, Jian-chun
中科院分区：
文献类型：
--
作者：
Gao, He;Gu, Zhong-ming;Cheng, Jian-chun
我们提出了一种能够产生高效声聚焦的方案，该方案能够绕过传播介质中的障碍物。这种独特的特点是非常理想的实际应用是通过采用两个对称的艾里光束实现的，并且通过使用零折射率介质设计了一种不同类型的声学透镜，以提供所需的相位轮廓，具有极高的分辨率。此外，该方案还具有产生可调焦距的灵活性。我们期望我们的设计为声学透镜的设计开辟可能性，并在生物医学成像/治疗和非破坏性评估等各种重要场景中具有潜在的应用。
We propose a scheme for generating high-efficient acoustic focusing capable of circumventing obstacles in the propagating medium. This distinct feature that is highly desirable for practical applications is realized by employing two symmetrical Airy beams, and a different type of acoustic lens is designed by using a zero-index medium to provide the required phase profile with extremely high resolution. Furthermore, the scheme has the flexibility of generating tunable focal length. We anticipate our design to open possibilities for the design of acoustic lens and have potential applications in various important scenarios such as biomedical imaging/therapy and non-destructive evaluation.