| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Wavefront modulation of water surface wave by a metasurface |
| Sun Hai-Tao (孙海涛)a, Cheng Ying (程营)a, Wang Jing-Shi (王敬时)b, Liu Xiao-Jun (刘晓峻)a |
a Department of Physics, Nanjing University, Nanjing 210093, China;
b School of Electronics and Information, Nantong University, Nantong 226019, China |
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Abstract We design a planar metasurface to modulate the wavefront of a water surface wave (WSW) on a deep sub-wavelength scale. The metasurface is composed of an array of coiling-up-space units with specially designed parameters, and can take on the work of steering the wavefront when it is pierced into water. Like their acoustic counterparts, the modulation of WSW is ascribed to the gradient phase shift of the coiling-up-space units, which can be perfectly tuned by changing the coiling plate length and channel number inside the units. According to the generalized Snell's law, negative refraction and ‘driven' surface mode of WSW are also demonstrated at certain incidences. Specially, the transmitted WSW could be efficiently guided out by linking a symmetrically-corrugated channel in ‘driven' surface mode. This work may have potential applications in water wave energy extraction and coastal protection.
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Received: 12 May 2015
Revised: 17 June 2015
Accepted manuscript online:
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PACS:
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43.35.+d
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(Ultrasonics, quantum acoustics, and physical effects of sound)
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47.35.-i
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(Hydrodynamic waves)
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46.40.Cd
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(Mechanical wave propagation (including diffraction, scattering, and dispersion))
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92.10.Sx
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(Coastal, estuarine, and near shore processes)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2012CB921504), the National Natural Science Foundation of China (Grant Nos. 11474162, 11274171, 11274099, and 11204145), and the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant Nos. 20110091120040 and 20120091110001). |
Corresponding Authors:
Liu Xiao-Jun
E-mail: chengying@nju.edu.cn;liuxiaojun@nju.edu.cn
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Cite this article:
Sun Hai-Tao (孙海涛), Cheng Ying (程营), Wang Jing-Shi (王敬时), Liu Xiao-Jun (刘晓峻) Wavefront modulation of water surface wave by a metasurface 2015 Chin. Phys. B 24 104302
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