College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China.
Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen 361005, China.
Phys Rev Lett. 2019 Aug 16;123(7):074501. doi: 10.1103/PhysRevLett.123.074501.
Inspired by electromagnetic waveguide cloaks with gradient index metamaterials, we fabricated a broadband cloak with simply a gradient depth profile on the bottom and without any other structures on the top to confine water waves in a certain area for cloaking regions. The new physics of mode conversion for water waves is first found. The experimental and numerical simulation results are in good agreement and show that the presented device has a nice performance for various situations and is feasible over a broadband of working frequencies. Being easy to construct, this design is potentially of significance for port applications.
受梯度指数超材料电磁波导斗篷的启发，我们在底部制作了一个具有简单梯度深度轮廓的宽带斗篷，而在顶部没有任何其他结构，以将水波限制在特定区域内进行隐身区域。首次发现了水波模式转换的新物理现象。实验和数值模拟结果吻合较好，表明所提出的器件在各种情况下都具有良好的性能，并且在较宽的工作频率范围内是可行的。由于易于构建，这种设计对于港口应用具有潜在的重要意义。
