Ultrasonic cavity solitonsI. 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
received 19 September 2007; accepted in final form 8 February 2008; published April 2008
published online 12 March 2008
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.
05.45.-a - Nonlinear dynamics and chaos.
47.54.-r - Pattern selection; pattern formation.
43.25.+y - Nonlinear acoustics.
© EPLA 2008