Dispersive, superfluid-like shock waves in nonlinear optics: Properties & interactions
Dispersive, superfluid-like shock waves in nonlinear optics: Properties & interactions
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DOI：
10.1038/nphys486
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发表时间：
2007-05
期刊：
影响因子：
--
通讯作者：
W. Wan;Shu Jia;J. Fleischer
中科院分区：
文献类型：
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作者：
W. Wan;Shu Jia;J. Fleischer
在大多数经典流体中，冲击波具有很强的耗散性，它们的能量通过粘性阻尼很快消失。但在冷等离子体、超流体和玻色-爱因斯坦凝聚态等系统中，粘度可以忽略不计或不存在，可能会出现一种根本不同类型的冲击波，其行为主要是色散而不是耗散。色散冲击波很难通过实验进行研究，并且只能在一维 (1D) 中找到控制它们的方程的解析解。通过利用众所周知但鲜为人知的超流体行为与非线性光学材料之间的对应关系，我们展示了一个用于研究色散冲击波动力学的全光学实验平台。这使我们能够在一维和二维中观察色散冲击波的传播和非线性响应，包括碰撞冲击波的相互作用。我们的系统为探索类超流体和相关的色散现象提供了一种通用且更易于使用的方法。
In most classical fluids, shock waves are strongly dissipative, their energy being quickly lost through viscous damping. But in systems such as cold plasmas, superfluids and Bose–Einstein condensates, where viscosity is negligible or non-existent, a fundamentally different type of shock wave can emerge whose behaviour is dominated by dispersion rather than dissipation. Dispersive shock waves are difficult to study experimentally, and analytical solutions to the equations that govern them have only been found in one dimension (1D). By exploiting a well-known, but little appreciated, correspondence between the behaviour of superfluids and nonlinear optical materials, we demonstrate an all-optical experimental platform for studying the dynamics of dispersive shock waves. This enables us to observe the propagation and nonlinear response of dispersive shock waves, including the interaction of colliding shock waves, in 1D and 2D. Our system offers a versatile and more accessible means for exploring superfluid-like and related dispersive phenomena.