Experimental realization of a water-wave metamaterial shifter
Experimental realization of a water-wave metamaterial shifter
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DOI：
10.1103/physreve.88.051002
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发表时间：
2013-11-19
影响因子：
2.4
通讯作者：
Pagneux, V.
中科院分区：
文献类型：
--
作者：
Berraquero, C. P.;Maurel, A.;Pagneux, V.
我们通过定量的实验测量证明，具有各向异性特性的超材料可以用于水波的上下文中，以产生无反射的弯曲波导。各向异性介质存在于具有亚波长分层结构的水深测量中，该亚波长分层结构在波导弯曲的方向上（10度、20度和30度）移动波。用这种超材料填充的波导进行实验测试，并与参考空弯曲波导进行比较。用于表征波场的实验方法允许对水位进行时空分辨测量。实验结果表明了该移位器的有效性。模态处理的实验数据证实，超材料防止更高的模式被激发在波导中。
We demonstrate by quantitative experimental measurements that metamaterials with anisotropic properties can be used in the context of water waves to produce a reflectionless bent waveguide. The anisotropic medium consists in a bathymetry with subwavelength layered structure that shifts the wave in the direction of the waveguide bending (10 degrees, 20 degrees, and 30 degrees). The waveguide filled with such metamaterial is tested experimentally and compared to a reference empty bent waveguide. The experimental method used to characterize the wave field allows for space-time resolved measurements of water elevation. Results show the efficiency of the shifter. Modal treatment of the experimental data confirms that the metamaterial prevents higher modes from being excited in the waveguide.