title: Negative effective gravity in water waves by periodic resonator arrays.
abstract: Based on analytic derivations and numerical simulations, we show that near a low resonant frequency water waves cannot propagate through a periodic array of resonators (bottom-mounted split tubes) as if water has a negative effective gravitational acceleration g(e) and positive effective depth h(e). This gives rise to a low-frequency resonant band gap in which water waves can be strongly reflected by the resonator array. For a damping resonator array, the resonant gap can also dramatically modify the absorption efficiency of water waves. The results provide a mechanism to block water waves and should find applications in ocean wave energy extraction.
authors.affiliation: Department of Material Science, Laboratory of Advanced Materials, and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200433, China. huxh@fudan.edu.cn
authors.forename: Xinhua
authors.initials: X
authors.lastname: Hu
authors.forename: C T
authors.initials: CT
authors.lastname: Chan
authors.forename: Kai-Ming
authors.initials: KM
authors.lastname: Ho
authors.forename: Jian
authors.initials: J
authors.lastname: Zi