arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0903.5101physics.class-ph
收藏

超材料声学网络聚焦超声

Focusing Ultrasound with Acoustic Metamaterial Network

Shu Zhang, Leilei Yin, Nicholas Fang

摘要:

我们提出了第一个实验演示聚焦超声波通过平面声学超材料透镜组成的平面网络的亚波长亥姆霍兹谐振器。我们观察到一个半波长的宽度为60.5 KHz的点源成像的紧聚焦。这一结果与用传输线模型进行数值模拟得到的有效质量密度和可压缩性非常吻合。这种超材料透镜还在不同频率下显示可变焦距。我们的实验表明,设计紧凑,重量轻的超声成像元件的承诺。

英文摘要:

We present the first experimental demonstration of focusing ultrasound waves through a flat acoustic metamaterial lens composed of a planar network of subwavelength Helmholtz resonators. We observed a tight focus of half-wavelength in width at 60.5 KHz by imaging a point source. This result is in excellent agreement with the numerical simulation by transmission line model in which we derived the effective mass density and compressibility. This metamaterial lens also displays variable focal length at different frequencies. Our experiment shows the promise of designing compact and light-weight ultrasound imaging elements.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑