title: Resonant coupling of Rayleigh waves through a narrow fluid channel causing             extraordinary low acoustic transmission.
abstract: Coupling of Rayleigh waves propagating along two metal surfaces separated by a narrow fluid channel is predicted and experimentally observed. Although the coupling through a fluid (water) is weak, a strong synchronization in propagation of Rayleigh waves even for the metals with sufficiently high elastic contrast (brass and aluminum) is observed. Dispersion equation for two polarizations of the coupled Rayleigh waves is derived and experimentally confirmed. Excitation of coupled Rayleigh waves in a channel of finite length leads to anomalously low transmission of acoustic energy at discrete set of resonant frequencies. This effect may find useful applications in the design of acoustic metamaterial screens and reflectors.
authors.affiliation: Wave Phenomena Group, Universidad Politècnica de València, Camino de Vera s/n, E-46022 Valencia, Spain.
authors.forename: Victor M
authors.initials: VM
authors.lastname: Garcia-Chocano
authors.lastname: Nagaraj
authors.forename: Tomàs
authors.initials: T
authors.lastname: Lòpez-Rios
authors.forename: Lyudmila
authors.initials: L
authors.lastname: Gumen
authors.forename: Josè
authors.initials: J
authors.lastname: Sànchez-Dehesa
authors.forename: Arkadii
authors.initials: A
authors.lastname: Krokhin
mesh_terms: D000535:Aluminum; D003300:Copper; D004548:Elasticity; D008420:Manufactured Materials; D008962:Models, Theoretical; D009038:Motion; D009991:Oscillometry; D011312:Pressure; D013016:Sound; D014465:Ultrasonics / Q000295:instrumentation*; D014732:Vibration; D014867:Water; D015032:Zinc
chemical_list: D014867:Water; C048399:brass; D003300:Copper; D000535:Aluminum; D015032:Zinc