Buscar en RiuNet

Listar

Todo RiuNet

Mi cuenta

Acceder

Ayuda RiuNet

Admin. UPV

Listar por palabra clave "Phononic crystals"

Mostrando ítems 1-11 de 11

Acoustically penetrable sonic crystals based on fluid-like scatterers

Cebrecos Ruiz, Alejandro; Romero García, Vicente; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; Botey, M.; Herrero, R.; Cheng, Y. C.; Staliünas, Kestutis (IOP Publishing: Hybrid Open Access, 2015-01-21)

We propose a periodic structure that behaves as a fluid fluid composite for sound waves, where the building blocks are clusters of rigid scatterers. Such building-blocks are penetrable for acoustic waves, and their properties ...
Caracterización experimental de la focalización en un cristal de sonido 3D

Hamard, Simon (Universitat Politècnica de València, 2013-05-21)

En un medio continuo e isótropo, una onda acústica se propaga de manera omnidireccional. Sin embargo, para algunas aplicaciones, puede ser útil restringir la difusión de una señal sonora dentro de un espacio finito. Los ...
Design, Manufacture and Characterization of an Acoustic Barrier Made of Multi-Phenomena Cylindrical Scatterers Arranged in a Fractal-Based Geometry

Castiñeira Ibáñez, Sergio; Rubio Michavila, Constanza; Romero García, Vicente; Sánchez Pérez, Juan Vicente; García Raffi, Luis Miguel (De Gruyter, 2012)

In this work we present the design and the manufacturing processes, as well as the acoustics standard-ization tests, of an acoustic barrier formed by a set of multi-phenomena cylindrical scatterers. Periodic arrangements ...
Directional Ultrasound Source for Solid Materials Inspection: Diffraction Management in a Metallic Phononic Crystal

Selim, Hossam; Picó Vila, Rubén; Trull, Jose; Delgado Prieto, Miguel; Cojocaru, Crina (MDPI AG, 2020-11)

[EN] In this work, we numerically investigate the diffraction management of longitudinal elastic waves propagating in a two-dimensional metallic phononic crystal. We demonstrate that this structure acts as an "ultrasonic ...
Effect of loss on the dispersion relation of photonic and phononic crystals

Laude, Vincent; Escalante Fernández, José María; Martínez Abietar, Alejandro José (American Physical Society, 2013-12)

[EN] A theoretical analysis is made of the transformation of the dispersion relation of waves in artificial crystals under the influence of loss, including the case of photonic and phononic crystals. Considering a general ...
Enhanced of sound by soft reflections in exponentially chirped crystals

Cebrecos Ruiz, Alejandro; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; Staliünas, Kestutis; Romero García, Vicente; García-Raffi, L. M. (American Institute of Physics (AIP): Open Access Journals, 2014-12)

The enhancement of sound inside a two dimensional exponentially chirped crystal during the soft reflections of waves is experimentally and theoretically explored in this work. The control of this enhancement is achieved ...
Estudio numérico de la focalización de ondas evanescentes con una estructura periódica

Tomàs Ibiza, Fernando (Universitat Politècnica de València, 2013-11-26)

Los cristales fonónicos y sónicos han generado un creciente interés científico para aplicaciones tecnológicas muy diversas. Estos cristales están compuestos de distribuciones periódicas de dispersores embebidos en una ...
Interferometric method of determining the refraction index of two-dimensional sonic crystals

Romero García, Vicente; Fuster García, Elíes; García-Raffi, L. M.; Sánchez Pérez, Juan Vicente; Uris Martínez, Antonio (American Physical Society, 2007)

[EN] Sonic crystals are defined as materials consisting of periodic distributions of acoustic scatterers in another medium with different elastic properties. These materials present two main acoustical features: they present ...
On the control of propagating acoustic waves in sonic crystals: analytical, numerical and optimization techniques

Romero García, Vicente (Universitat Politècnica de València, 2010-12-15)

El control de las propiedades acústicas de los cristales de sonido (CS) necesita del estudio de la distribución de dispersores en la propia estructura y de las propiedades acústicas intrínsecas de dichos dispersores. En ...
Phonons Manipulation in Silicon Chips Using Cavity Optomechanics

Mercadé Morales, Laura (Universitat Politècnica de València, 2021-07-26)

[ES] La optomecánica de cavidades se ocupa de la interacción entre la luz y la materia a través del efecto de presión de radiación cuando las ondas ópticas y mecánicas implicadas están confinadas en una cavidad. En estos ...
The finite-element time-domain method for elastic band-structure calculations

Cebrecos, Alejandro; Krattiger, Dimitri; Sánchez Morcillo, Víctor José; Romero García, Vicente; Hussein, Mahmoud Ismail (Elsevier, 2019-05)

[EN] The finite-element time-domain method for elastic band-structure calculations is presented in this paper. The method is based on discretizing the appropriate equations of motion by finite elements, applying Bloch ...