Acoustic superlens using membrane-based metamaterials
Acoustic superlens using membrane-based metamaterials
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DOI：
10.1063/1.4907634
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发表时间：
2015-02-02
影响因子：
4
通讯作者：
Lee, Sam H.
中科院分区：
文献类型：
--
作者：
Park, Jong Jin;Park, Choon Mahn;Lee, Sam H.
我们报道了用二维膜基负密度超材料构建的声超透镜。当两个相隔1/17波长的点源被放置在超材料平板的表面附近时，在横跨平板的相反表面上形成分辨率良好的图像。亚波长分辨的机制是由负密度产生的表面波。潜在的应用包括声学成像和传感。(C)2015 AIP出版有限责任公司。
We report construction of an acoustic superlensing using two dimensional membrane-based negative-density metamaterials. When two point sources separated by a distance of 1/17 of the wavelength are placed near to a surface of the metamaterial slab, well-resolved images are formed on the opposite surface across the slab. The mechanism for the subwavelength resolution is the surface wave stemming from negative density. Potential applications include acoustic imaging and sensing. (C) 2015 AIP Publishing LLC.