Issue
EPL
Volume 82, Number 1, April 2008
Article Number 10002
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/82/10002
Published online 12 March 2008
EPL, 82 (2008) 10002
DOI: 10.1209/0295-5075/82/10002

Ultrasonic cavity solitons

I. Pérez-Arjona1, V. J. Sánchez-Morcillo1 and G. J. de Valcárcel2

1  Departament de Física Aplicada, Universitat Politècnica de València - Crta. Natzaret-Oliva s/n, 46730 Grau de Gandia, Spain, EU
2  Departament d'Òptica, Universitat de València - Dr. Moliner 50, 46100 Burjassot, Spain, EU

iparjona@upvnet.upv.es

received 19 September 2007; accepted in final form 8 February 2008; published April 2008
published online 12 March 2008

Abstract
We report on a new type of localized structure, an ultrasonic cavity soliton, supported by large aspect-ratio acoustic resonators containing viscous media. These states of the acoustic and thermal fields are robust structures, existing whenever a spatially uniform solution and a periodic pattern coexist. Direct proof of their existence is given both through the numerical integration of the model and through the analysis and numerical integration of a generalized Swift-Hohenberg equation, derived from the microscopic equations under conditions close to nascent bistability. An analytical solution for the ultrasonic cavity soliton is given.

PACS
05.45.-a - Nonlinear dynamics and chaos.
47.54.-r - Pattern selection; pattern formation.
43.25.+y - Nonlinear acoustics.

© EPLA 2008