title: Manipulating Water Wave Propagation via Gradient Index Media.
abstract: It is challenging to realise the perfect manipulation of water waves within a broad range of frequencies. By extending conformal transformation principles to water waves, their propagation can be controlled via gradually varying water depths, permitting the realisation of a desired refractive index profile for linear water surface waves. Wave bending, directional wave emission and wave focusing are analysed experimentally with accompanying simulations. The results demonstrate desired wave manipulations within a broad range of frequencies, confirming the accuracy and effectiveness of conformal transformation for water waves.
authors.affiliation: College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Wang
authors.affiliation: College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Pei
authors.initials: P
authors.lastname: Zhang
authors.affiliation: College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Nie
authors.affiliation: College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Zhang