Soliton enhancement of spontaneous symmetry breaking
Soliton enhancement of spontaneous symmetry breaking
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DOI：
10.1364/optica.2.000783
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发表时间：
2015-09-20
期刊：
影响因子：
10.4
通讯作者：
Assanto, Gaetano
中科院分区：
文献类型：
--
作者：
Alberucci, Alessandro;Piccardi, Armando;Assanto, Gaetano
自发对称性破缺（SSB）发生在噪声触发一个初始对称的系统向其非对称状态演化的时候。拓扑和光学单边带分别涉及材料的重新配置/转变以及光在时间或空间中的传播/分布。在各向异性光学介质中，光束的传播和光轴的分布可以联系起来，从而连接拓扑和光学单边带。使用非线性软物质，即单轴液晶，我们报告同步拓扑和光学SSB，显示空间孤子增强噪声驱动的介质从对称到非对称配置的过渡，同时获得功率依赖的横向速度在两个镜面方向相对于初始波矢。孤子通过非线性重定向进一步扭曲光轴分布来增强SSB，从而导致功率可调的走离以及光束折射相对于入射角的滞后。(C)2015美国光学学会
Spontaneous symmetry breaking (SSB) occurs when noise triggers an initially symmetric system to evolve toward one of its nonsymmetric states. Topological and optical SSB involve material reconfiguration/transition and light propagation/distribution in time or space, respectively. In anisotropic optical media, light beam propagation and distribution of the optic axis can be linked, thereby connecting topological and optical SSB. Using nonlinear soft matter, namely uniaxial liquid crystals, we report on simultaneous topological and optical SSB, showing that spatial solitons enhance the noise-driven transition of the medium from a symmetric to an asymmetric configuration, while acquiring a power-dependent transverse velocity in either of two specular directions with respect to the initial wavevector. Solitons enhance SSB by further distorting the optic axis distribution through nonlinear reorientation, resulting in power-tunable walk-off as well as hysteresis in beam refraction versus angle of incidence. (C) 2015 Optical Society of America