학술논문
Growth laws, pinning and localized structures: an experiment in sodium vapor
Document Type
Conference
Author
Source
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on. :1-1 Jun, 2007
Subject
Language
Abstract
The nucleation problem in systems with two equivalent or nearly equivalent phases has attracted a lot of attention in equilibrium - and more recently - non-equilibrium physics. In two or more spatial dimensions the dynamics of a nucleation bubble is governed by curvature effects and possibly a 'pressure force' if the two states are not exactly equivalent. So far, however, there has been no experimental demonstration of this fact in a nonlinear optical system. We are going to address the question of front dynamics experimentally in a 2D nonlinear feedback system. We find a t 1/2 growth law if two homogeneous states coexist due to a symmetry-breaking pitchfork bifurcation. The implications of a slight and a deliberate breaking of the symmetry are also considered.