69 citations · 283 across the 13 of their papers we have counts for
13 papers
Aerogel-based metasurfaces for perfect acoustic energy absorption
Antonio A. Fernández-Marín, Noé Jiménez, Jean-Philippe Groby +2
The unusual viscoelastic properties of silica aerogel plates are efficiently used to design subwavelength perfect sound absorbers. We theoretically, numerically and experimentally…
On the use of aerogel as a soft acoustic metamaterial for airborne sound
Matthew D. Guild, Victor M. García-Chocano, José Sánchez-Dehesa +3
Soft acoustic metamaterials utilizing mesoporous structures have recently been proposed as a novel means for tuning the overall effective properties of the metamaterial and providi…
Experimental evidence of total absorption by a thin absorbing layer deposited on a patterned metallic surface
Ana Díaz-Rubio, Alastair Hibbins, Jorge Carbonell +1
This work presents the experimental demonstration of total absorption by a metal-dielectric metasurface. Following the theoretical proposal [A. Díaz-Rubio et al. Phys. Rev. B 89, 2…
Experimental evidence of giant pure optical activity in a metasurface based on a complementary twisted cross configuration
Ana Díaz-Rubio, Ben Tremain, Jorge Carbonell +2
This work presents an experimental study of giant and pure optical activity in a periodic structure consisting of twisted crosses and complementary crosses patterned on the sides o…
Transformational acoustic metamaterials based on pressure gradients
C. García-Meca, S. Carloni, C. Barceló +3
We apply a homogenization process to the acoustic velocity potential wave equation. The study of various examples shows that the resulting effective properties are different from t…
Acoustic metamaterial absorbers based on confined sonic crystals
Matthew D. Guild, Victor M. Garcia-Chocano, Weiwei Kan +1
Theoretical, numerical and experimental results examining thermoviscous losses in sonic crystals are presented in this work, enabling the fabrication and characterization of an aco…
Analysis of Metal-Dielectric Waveguides with Circular Sectors
Daniel Torrent, Benito Gimeno, Vicente E. Boria +1
The study of metallic corrugated surfaces has recently received strong attention due to their ability to mimic the behaviour of surface plasmons. In this work, this plasmon-like be…
Omnidirectional broadband insulating device for flexural waves in thin plates
Alfonso Climente, Daniel Torrent, José Sánchez-Dehesa
This work presents a gradient index device for insulating from vibrations a circular area of a thin plate. The gradient of the refractive index is achieved by locally changing the…
Spacetime transformation acoustics
C. García-Meca, S. Carloni, C. Barceló +3
A recently proposed analogue transformation method has allowed the extension of transformation acoustics to general spacetime transformations. We analyze here in detail the differe…
Low-Q whispering gallery modes in anisotropic metamaterial shells
Ana Díaz-Rubio, Jorge Carbonell, Daniel Torrent +1
Anisotropic and inhomogeneous metamaterial shells are studied in order to exploit all their resonant mode richness. These multilayer structures are based on a cylindrical distribut…
Optimum control of broadband noise by barriers based on sonic crystals
Victor Manuel García-Chocano, José Sánchez-Dehesa
It is demonstrated that sonic crystals (periodic structures of sound scatterers) can be used to design acoustic barriers that attenuate efficiently broadband noise. Traffic noise i…
Multiple Scattering Formulation of Two Dimensional Acoustic and Electromagnetic Metamaterials
Daniel Torrent, José Sánchez-Dehesa
This work presents a multiple scattering formulation of two dimensional acoustic metamaterials. It is shown that in the low frequency limit multiple scattering allows us to define…
Acoustic resonances in two dimensional radial sonic crystals shells
Daniel Torrent, José Sánchez-Dehesa
Radial sonic crystals (RSC) are fluidlike structures infinitely periodic along the radial direction. They have been recently introduced and are only possible thanks to the anisotro…