中国物理B ›› 2015, Vol. 24 ›› Issue (10): 104302-104302.doi: 10.1088/1674-1056/24/10/104302

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Wavefront modulation of water surface wave by a metasurface

孙海涛a, 程营a, 王敬时b, 刘晓峻a   

  1. a Department of Physics, Nanjing University, Nanjing 210093, China;
    b School of Electronics and Information, Nantong University, Nantong 226019, China
  • 收稿日期:2015-05-12 修回日期:2015-06-17 出版日期:2015-10-05 发布日期:2015-10-05
  • 基金资助:
    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).

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   

  1. a Department of Physics, Nanjing University, Nanjing 210093, China;
    b School of Electronics and Information, Nantong University, Nantong 226019, China
  • Received:2015-05-12 Revised:2015-06-17 Online:2015-10-05 Published:2015-10-05
  • Contact: Liu Xiao-Jun E-mail:chengying@nju.edu.cn;liuxiaojun@nju.edu.cn
  • Supported by:
    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).

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摘要： 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.

关键词: metasurface, water surface wave, negative refraction, coiling up space

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.

Key words: metasurface, water surface wave, negative refraction, coiling up space

中图分类号:  (Ultrasonics, quantum acoustics, and physical effects of sound)

  • 43.35.+d
47.35.-i (Hydrodynamic waves) 46.40.Cd (Mechanical wave propagation (including diffraction, scattering, and dispersion)) 92.10.Sx (Coastal, estuarine, and near shore processes)