[EN] We present deep-subwavelength diffusing surfaces based on acoustic metamaterials, namely metadiffusers. These sound diffusers are rigidly backed slotted panels, with each slit being loaded by an array of Helmholtz ...
Diaz Rubio, Ana; Kosulnikov, Sergei; Tretyakov, Sergei(Institute of Electrical and Electronics Engineers, 2022-08)
[EN] The use of reconfigurable intelligent surfaces (RISs) foroptimization of propagation channels is one of the most promising and revolutionizing techniques for improving efficiency of the next generation of communications ...
Samaniego-Riera, Diego; Vidal Rodriguez, Borja(Institute of Electrical and Electronics Engineers (IEEE), 2016-12)
A method to enhance the filter slope of Brillouin-based photonic microwave filters is presented. This improvement is achieved by the combination of Brillouin gain and loss responses over phase-modulated signals. The ...
Vilaplana Cerda, Rosario Isabel(Universitat Politècnica de València, 2008-05-06)
Esta tesis está enfocada a la obtención de las propiedades de scattering de una distribución de partículas no esféricas y a su aplicación a las observaciones astronómicas, en longitudes de onda del dominio visible, del ...
A fluid channel clad between two solid plates is an acoustic waveguide where excitation of elastic waves at the channel boundaries has been usually neglected. This work develops a rigorous theory of scattering of sound by ...
Salmerón Contreras, Luis José(Universitat Politècnica de València, 2016-01-08)
[EN] In the last decades, the control of the propagation of light, elastic and acoustic waves through periodic media has aroused great interest. These are known as photonic, phononic or sound crystals, respectively. These ...
[EN] Most simulations involving metamaterials often require complex physics to be solved through refined meshing grids. However, it can prove challenging to simulate the effect of local physical conditions created by said ...
[EN] In this work, we show that scattered acoustic vortices generated by metasurfaces with chiral symmetry present broadband unusual properties in the far-field. These metasurfaces are designed to encode the holographic ...
[EN] We report the experimental design of a one-dimensional stealth acoustic material, namely a material that suppresses the acoustic scattering for a given set of incident wave vectors. The material consists of multiple ...
Vilaplana Cerda, Rosario Isabel; Luna Molina, Ramón; Guirado, D.(Elsevier, 2011)
[EN] In order to identify the type of scattering profile that corresponds to some specific shapes, we have performed calculations of some scattering properties for those shapes with a fixed size distribution. Aggregates ...
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 ...
Sancho Durá, Juan; Sales Maicas, Salvador; Primerov, N.; Chin, S.; Antman, Y.; Zadok, A; Thevenaz, L.(Optical Society of America, 2012)
We propose and experimentally demonstrate new architectures to realize multi-tap microwave photonic filters, based on the generation of a single or multiple dynamic Brillouin gratings in polarization maintaining fibers. ...