Anomalous manipulation of acoustic wavefront with an ultrathin planar metasurface
Anomalous manipulation of acoustic wavefront with an ultrathin planar metasurface
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DOI：
10.1115/1.4033258
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发表时间：
2016-08
期刊：
影响因子：
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通讯作者：
S. Zhai;C. Ding;Huaijun Chen;Fangliang Shen;C. Luo;Xiaopeng Zhao
中科院分区：
文献类型：
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作者：
S. Zhai;C. Ding;Huaijun Chen;Fangliang Shen;C. Luo;Xiaopeng Zhao
超颖表面的研究为超颖材料的研究开辟了一个新的方向。我们提出了一种由一系列结构简单的微单元组成的声学元表面。微单元由充满空气的腔和密封空气的膜构成。所设计的超表面可以任意操纵3.7 kHz的反射声波。我们还通过在超颖表面上精心布置微单元，包括轴棱锥和透镜，实现了平面聚焦效果。所设计的超材料可以促进隐身、吸声、频谱分离等声学器件的发展。
The investigations of metasurfaces have introduced a new direction in researching metamaterials. We propose an ultrathin acoustic metasurface consisting of a series of structurally simple microunits. The microunit is constructed with a cavity filled with air and a membrane to seal the air. The designed metasurfaces can arbitrarily manipulate the reflected sound waves at 3.7 kHz. We also realize the planar focusing effects by elaborately arranging the microunits on the metasurfaces, including an axicon and a lens. The designed metamaterials may promote the development of many acoustic devices, such as cloaking, absorber, and spectrum splitter.