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
孙海涛a, 程营a, 王敬时b, 刘晓峻a
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
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.
中图分类号: (Ultrasonics, quantum acoustics, and physical effects of sound)