Nonlinear self-collimated sound beams in sonic crystals

We report the propagation of high-intensity sound beams in a sonic crystal, under self-collimation or reduced-divergence conditions. The medium is a fluid with elastic quadratic nonlinearity, where the dominating nonlinear effect is harmonic generation. The conditions for the efficient generation of...

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Detalles Bibliográficos
Autores: Hamham, El Mokhtar, Staliünas, Kestutis, Jimenez, Noe|||0000-0002-6539-670X, Picó Vila, Rubén|||0000-0003-3537-9658, Sánchez Morcillo, Víctor José|||0000-0003-4766-1263, García-Raffi, L. M.|||0000-0003-3985-8453
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/63779
Acceso en línea:https://riunet.upv.es/handle/10251/63779
Access Level:acceso abierto
Palabra clave:Nonlinear
Second harmonic generation
Sonic crystals
MATEMATICA APLICADA
FISICA APLICADA
Descripción
Sumario:We report the propagation of high-intensity sound beams in a sonic crystal, under self-collimation or reduced-divergence conditions. The medium is a fluid with elastic quadratic nonlinearity, where the dominating nonlinear effect is harmonic generation. The conditions for the efficient generation of narrow, nondiverging beam of second harmonic are discussed. Numerical simulations are in agreement with the analytical predictions made, based on the linear dispersion characteristics in modulated media and the nonlinear interaction in a quadratic medium under phase matching conditions.

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