Acoustic lens: A thin plate with quasi-periodic array of holes
Acoustic lens: A thin plate with quasi-periodic array of holes
复制标题
声透镜：具有准周期孔阵列的薄板
DOI：
10.1016/j.ssc.2014.01.013
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发表时间：
2014-05-01
影响因子：
2.1
通讯作者：
Liu, Zhengyou
中科院分区：
文献类型：
--
作者：
Ye, Yangtao;Ke, Manzhu;Liu, Zhengyou
制作了一种具有准周期孔阵列的薄钢板，证明了它能够起到声透镜的作用。无论是一个平面波或一个点源在物体空间中，热点与最小的尺寸高达五分之一波长观察后倏逝场制度在图像空间中。还展示了在不同位置具有良好分辨率的点源的成像。奇异场分布源于准周期结构特有的衍射光束的干涉，产生清晰而丰富的衍射图案。(C)2014爱思唯尔有限公司版权所有。
A thin steel plate with quasi-periodic array of holes is fabricated, which is demonstrated to be able to function as an acoustic lens. With either a plane wave or a point source in object space, hotspots with the smallest size up to one-fifth wavelength are observed in the post-evanescent field regime in image space. Imaging of a point source with good resolution at different positions is also exhibited. The singular field distributions originate from the interference of the diffractive beams specific to quasi-periodic structures, which generates distinct and plentiful diffractive patterns. (C) 2014 Elsevier Ltd. All rights reserved.