Underwater Focusing of Sound by Umklapp Diffraction

  title={Underwater Focusing of Sound by Umklapp Diffraction},
  author={Gregory J. Chaplain and Richard V. Craster and N. Cole and Alastair P. Hibbins and Timothy A. Starkey},
  journal={Physical Review Applied},
Gregory J. Chaplain, Richard V. Craster, Nick Cole, Alastair P. Hibbins and Timothy A. Starkey 1 Department of Mathematics, Imperial College London, London SW7 2AZ, UK 2 Centre for Metamaterials Research and Innovation, University of Exeter, Exeter EX4 4QL, United Kingdom 3 Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK 4 UMI 2004 Abraham de Moivre-CNRS, Imperial College London, London SW7 2AZ, UK 

Figures from this paper


Collimation of sound assisted by acoustic surface waves
The discovery of the phenomenon of extraordinary optical transmission through a two-dimensional array of subwavelength holes in a metallic film1 has opened a new line of research within optics. The
Bessel beams: Diffraction in a new light
Diffraction is a cornerstone of optical physics and has implications for the design of all optical systems. The paper discusses the so-called 'non-diffracting' light field, commonly known as the
Rayleigh–Bloch waves along elastic diffraction gratings
Rayleigh–Bloch (RB) waves in elasticity, in contrast to those in scalar wave systems, appear to have had little attention. Despite the importance of RB waves in applications, their connections to
Delineating rainbow reflection and trapping with applications for energy harvesting
Important distinctions are made between two related wave control mechanisms that act to spatially separate frequency components; these so-called rainbow mechanisms either slow or reverse guided waves
Underwater acoustic surface waves on a periodically perforated metal plate.
The excitation and propagation of the lowest-order surface mode supported by a square array of open-ended cavities on a metal plate submerged in water is demonstrated, and the measured dispersion shows good agreement with the predictions of a numerical model.
Seismic metasurfaces: Sub-wavelength resonators and Rayleigh wave interaction
We consider the canonical problem of an array of rods, which act as resonators, placed on an elastic substrate; the substrate being either a thin elastic plate or an elastic half-space. In both cases
Rayleigh–Bloch, topological edge and interface waves for structured elastic plates
Galvanised by the emergent fields of metamaterials and topological wave physics, there is currently much interest in controlling wave propagation along structured arrays, and interfacial waves
Calculating the full leaky Lamb wave spectrum with exact fluid interaction.
The full phase velocity dispersion diagram and attenuation curves are presented and are shown to be in excellent agreement with solutions of the characteristic equation as well as computations made with a perturbation method.
Transmission, Reflection, and Guiding of an Exponential Pulse by a Steel Plate in Water
The problem of the action of an underwater explosion—a pulse of the form pmaxe−t/τ—on an elastic plate in water can be divided into two parts. In the first, the plate is considered as an infinite
Bird of Passage—Recollections of a Physicist
Here is the intensely personal and often humorous autobiography of one of the most distinguished theoretical physicists of his generation, Sir Rudolf Peierls. Born in Germany in 1907, Peierls was