Acoustic focusing by symmetrical self-bending beams with phase modulations

被引：86

作者：

Gao, He ^{[1
,2
]}

Gu, Zhong-ming ^{[1
,2
]}

Liang, Bin ^{[1
,2
]}

Zou, Xin-ye ^{[1
,2
,3
]}

Yang, Jing ^{[1
,2
]}

Yang, Jun ^{[4
]}

Cheng, Jian-chun ^{[1
,2
]}

机构：

[1] Nanjing Univ, Inst Acoust, Dept Phys, Key Lab Modern Acoust,MOE, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Chinese Acad Sci, State Key Lab Acoust, Beijing 100190, Peoples R China

[4] Chinese Acad Sci, Inst Acoust, Key Lab Noise & Vibrat Res, Beijing 100190, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 07期

基金：

中国国家自然科学基金;

关键词：

METAMATERIALS; MANIPULATION; ULTRASOUND;

D O I：

10.1063/1.4941992

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2016 AIP Publishing LLC.

引用

页数：5

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