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Ultrasonic focusing with mesoscale polymer cuboid
Ultrasonics ( IF 4.2 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.ultras.2020.106143
Daniel Tarrazó-Serrano 1 , Constanza Rubio 1 , Oleg V Minin 2 , Antonio Uris 1 , Igor V Minin 2
Affiliation  

In this paper, we demonstrate that, contrary to what the Geometrical Optics laws dictate, a flat polymer mesoscale cuboid immersed in water with no need of negative refraction can focus sound. Two main polymers were considered and lens parameters compared: PMMA and Rexolite®. It was concluded that Rexolite® is preferable for acoustic jet formation. The nature of the formation of the foci along the longitudinal axis, that is to say along the wave propagation axis, is numerically and experimentally demonstrated. In addition, the conditions under which a cubic particles lens of this type forms a single localized region with a sub-diffraction transverse size (approximately 0.44 wavelength) are determined. The comparisons of the acoustic wave pressures and the focal distance between the Finite Element Method based numerical results and the experimental results show fair agreement.

中文翻译:

中尺度聚合物长方体超声聚焦

在本文中,我们证明,与几何光学定律所规定的相反,浸入水中的扁平聚合物中尺度长方体无需负折射即可聚焦声音。考虑了两种主要聚合物并比较了镜片参数:PMMA 和 Rexolite®。得出的结论是 Rexolite® 更适合用于声射流形成。沿纵轴,即沿波传播轴形成焦点的性质在数值上和实验上都得到了证明。此外,确定了这种类型的立方粒子透镜形成具有亚衍射横向尺寸(大约 0.44 波长)的单个局部区域的条件。
更新日期:2020-08-01
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