Observation of Ultrabroadband Acoustic Focusing Based on V‐Shaped Meta‐Atoms,Advanced Materials Technologies

当前位置： X-MOL 学术 › Adv. Mater. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Observation of Ultrabroadband Acoustic Focusing Based on V‐Shaped Meta‐Atoms
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-01-13 , DOI: 10.1002/admt.201900956
Tian‐Chi Zhang _{1,

2} , Jia‐He Chen ₁ , Jiao Qian ₁ , Yong Ge ₁ , Shou‐Qi Yuan ₁ , Hong‐Xiang Sun _{1,

3} , Xiao‐Jun Liu _{3,

4}

Affiliation

Acoustic focusing has extensive applications in medical ultrasound and nondestructive detection. The recent rapid development of acoustic metamaterials and metasurfaces has provided various mechanisms for designing advanced focusing lenses. However, the realization of acoustic focusing lenses with ultrabroad bandwidth still remains a challenge. To overcome it, ultrabroadband acoustic focusing lens based on phased unit cells composed of different numbers of same V‐shaped meta‐atoms is theoretically proposed and experimentally realized. By using eight types of unit cells, the fractional bandwidth of the acoustic lens can reach about 1.12 with a high focusing performance. Moreover, based on two types of unit cells with a phase difference of π, the fractional bandwidth of the focusing lens still reaches about 0.76 with the same criteria, showing a high robustness characteristic. The proposed acoustic focusing lenses have the advantages of ultrabroad bandwidths, simple fabrication and assembly, and high robustness, which provide diverse routes to construct ultrabroadband sound devices for medical ultrasound and nondestructive detection.

中文翻译：

基于V形元原子的超宽带声聚焦观测

声聚焦在医学超声和无损检测中有广泛的应用。声学超材料和超表面的最新快速发展为设计高级聚焦透镜提供了各种机制。然而，实现具有超宽带的声聚焦透镜仍然是一个挑战。为了克服这个问题，理论上提出并通过实验实现了基于相控单元的超宽带声聚焦透镜，该相控单元由不同数量的相同的V形亚原子组成。通过使用八种类型的晶胞，声透镜的分数带宽可以达到约1.12，并具有很高的聚焦性能。而且，基于两种具有π相位差的单位晶胞，在相同的条件下，聚焦透镜的分数带宽仍然达到约0.76，表现出很高的鲁棒性。所提出的声聚焦透镜具有超宽带带宽，简单的制造和组装以及高耐用性的优点，这为构造用于医学超声和无损检测的超宽带声音设备提供了多种途径。

更新日期：2020-02-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11