Climente Alarcón, Alfonso; Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José(American Institute of Physics (AIP), 2013)
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 exploiting the thickness-dependence of the dispersion relation of ...
García Chocano, Víctor Manuel; Graciá Salgado, Rogelio; Torrent Martí, Daniel; Cervera Moreno, Francisco Salvador; Sánchez-Dehesa Moreno-Cid, José(American Physical Society, 2012-05-14)
We present the experimental realization and characterization of an acoustic metamaterial with negative bulk modulus. The metamaterial consists of a two-dimensional array of cylindrical cavities, and the bulk modulus is ...
Elnady, Tamer; Elsabbagh, A.; Akl, W.; Mohamady, O.; García Chocano, Víctor Manuel; Torrent Martí, Daniel; Cervera Moreno, Francisco Salvador; Sánchez-Dehesa Moreno-Cid, José(American Institute of Physics (AIP), 2009-03-30)
We report an experimental study of acoustic effects produced by wind impinging on noise barriers based on two-dimensional sonic crystals with square symmetry. We found that the attenuation strength of sonic-crystal bandgaps ...
Based on the concepts of artificially microstructured materials, i.e. metamaterials, we present here the first practical realization of a radial wave crystal. This type of device was introduced as a theoretical proposal ...
Carbonell Olivares, Jorge; Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José(Institute of Electrical and Electronics Engineers (IEEE), 2013-02)
Radial photonic crystals (RPCs) are a class of microstructured
media that possess very particular electromagnetic
features. Their properties are driven by radially dependent permittivity
and permeability profiles that ...
García Chocano, Víctor Manuel; Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José(American Institute of Physics, 2012-08-22)
This letter presents the design of a reduced acoustic cloak that uses a temperature gradient in order to obtain sound speeds larger than in air. The cloak consists of a circular acoustic crystal made of ten concentric ...
Climente Alarcón, Alfonso(Editorial Universitat Politècnica de València, 2015-03-31)
The aim of this work has been the design and demonstration of refractive
devices, not only for acoustic waves, but also for flexural waves in thin plates.
Mathematically these problems have been treated by means of the ...
Climente Alarcón, Alfonso; Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José(American Institute of Physics (AIP), 2010-09-06)
Gradient index sonic lenses based on two-dimensional sonic crystals are here designed, fabricated, and characterized. The index-gradient is achieved in these type of flat lenses by a gradual modification of the sonic crystal ...
Torrent Martí, Daniel(Universitat Politècnica de València, 2008-09-12)
El objetivo de este trabajo ha sido obtener expresiones matemáticas para los parámetros elásticos y acústicos efectivos de sistemas heterogéneos en el límite de homogeneización, lo que ha permitido el diseño de nuevos ...
Spatial gradients in a refractive index are used extensively in acoustic metamaterial applications to control wave propagation through phase delay. This study reports the design and experimental realization of an acoustic ...