Acoustic energy control of sandwich acoustic topologies

IF 3.9 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xiao Liang, Zhen Wang, Jiangxia Luo, Guojian Zhou
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引用次数: 0

Abstract

Acoustic topologies have received attention mainly due to their extreme acoustic transport capabilities. However, previous acoustic topologies were derived from arrays of scatterers. The pseudo-spin positions of phononic crystals tend to exist only at the K or Г points in the Brillouin zone. This paper proposes a periodic sandwich acoustic topology without scatterers. By gouging out the periodic cylindrical structure in the bottom plate, the air sandwich in the center is made to have acoustic topological properties. This sandwich structure allows for a pseudo-spin acoustic flow at both the K and Г points in the Brillouin zone, thus enabling a stronger acoustic transmission. The absence of scatterers means that applications will be possible in more fields. Meanwhile, this research proposes a method to control the intensity of acoustic flow based on this structure. By introducing a specially designed acoustic flow switch, arbitrary control of the acoustic flow intensity on the edge-state path can be realized. The proposed method will help to cope with scenarios where different acoustic flow intensities need to be output. This has a high potential for applications such as separating particles with different masses in microfluidics.

夹层声学拓扑结构的声能控制
声学拓扑结构由于其超强的声学传输能力而备受关注。然而,以前的声学拓扑结构是由散射体阵列导出的。声子晶体的伪自旋位置往往只存在于布里渊区的K点或Г点。提出了一种不含散射体的周期夹层声学拓扑结构。通过在底板上凿出周期性圆柱结构,使中间的空气夹层具有声学拓扑特性。这种夹层结构允许在布里渊区的K点和Г点处进行伪自旋声流,从而实现更强的声传输。散射体的缺失意味着在更多领域的应用将成为可能。同时,本研究提出了一种基于该结构的声流强度控制方法。通过引入特殊设计的声流开关,可以实现对边缘状态路径上声流强度的任意控制。所提出的方法将有助于处理需要输出不同声流强度的情况。这对于微流体中不同质量颗粒的分离等应用具有很大的潜力。
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来源期刊
Journal of Materials Science
Journal of Materials Science 工程技术-材料科学:综合
CiteScore
7.90
自引率
4.40%
发文量
1297
审稿时长
2.4 months
期刊介绍: The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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