Broadband Waveguide Cloak for Water Waves

Siyuan Zou; Yadong Xu; Razafizana Zatianina; Chunyang Li; Xu Liang; Lili Zhu; Yongqiang Zhang; Guohua Liu; Qing Huo Liu; Huanyang Chen; Zhenyu Wang

doi:10.1103/PhysRevLett.123.074501

Broadband Waveguide Cloak for Water Waves

Phys Rev Lett. 2019 Aug 16;123(7):074501. doi: 10.1103/PhysRevLett.123.074501.

Authors

Siyuan Zou^{1

2}, Yadong Xu³, Razafizana Zatianina¹, Chunyang Li¹, Xu Liang⁴, Lili Zhu¹, Yongqiang Zhang¹, Guohua Liu¹, Qing Huo Liu⁵, Huanyang Chen², Zhenyu Wang¹

Affiliations

¹ College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China.
² Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen 361005, China.
³ School of Physical Science and Technology and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, China.
⁴ Ocean College, Zhejiang University, Zhoushan 316021, China.
⁵ Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA.

PMID: 31491099
DOI: 10.1103/PhysRevLett.123.074501

Abstract

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.