Focusing of water waves with a shallow-draft cylinder array

Author:

Zhao Xinyu1ORCID,Sun Xiaodong1ORCID,Li Yichen1ORCID,Hu Xinhua1ORCID,Che Zhiyuan2ORCID,Shi Lei2ORCID,Zi Jian2ORCID

Affiliation:

1. Department of Materials Science and Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), Fudan University 1 , Shanghai 200433, China

2. Department of Physics, State Key Laboratory of Surface Physics, and Collaborative Innovation Center of Advanced Microstructures, Fudan University 2 , Shanghai 200433, China

Abstract

The propagation of water waves can be manipulated via artificial structures. However, such structures usually need to possess a large volume ratio in water, and it may not be easy to build and move them in practical ocean engineering. Here, we theoretically propose and experimentally demonstrate a fixed, shallow-draft cylinder array that can refract and focus water waves within a wide range of wavelengths. When impinging upon the cylinder array from a region of water without structures, water waves can be slightly reflected at the surface of the array and speeded up in the array. As a result, favorable focusing performances such as a short focal length and high intensity at the focal point are observed.

Funder

National Key Research and Development Program of China

Publisher

AIP Publishing

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