Observation of Photon Droplets and Their Dynamics.
Observation of Photon Droplets and Their Dynamics.
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DOI：
10.1103/physrevlett.121.133903
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发表时间：
2018-08
影响因子：
8.6
通讯作者：
K. Wilson;N. Westerberg;M. Valiente;C. Duncan;E. Wright;P. Öhberg;D. Faccio
中科院分区：
文献类型：
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作者：
K. Wilson;N. Westerberg;M. Valiente;C. Duncan;E. Wright;P. Öhberg;D. Faccio
我们提出了光子液滴在吸引（聚焦）非局域非线性介质中的实验证据。光子液滴是自束缚的、有限尺寸的光态，由于竞争吸引力和排斥力的平衡，它们对尺寸和形状扰动具有鲁棒性。最近从理论上证明，通过非局域非线性的多极展开，自束缚态是由于 s 波和 d 波非线性项之间的竞争以及衍射而产生的。理论上的光子液滴框架涵盖了类孤子静止基态和当系统脱离平衡（即被驱动进入激发态）时随之而来的非孤子动力学。我们提出了支持这些光子液滴状态存在的数值和实验以及光子液滴轨道角动量动态演化的测量。
We present experimental evidence of photon droplets in an attractive (focusing) nonlocal nonlinear medium. Photon droplets are self-bound, finite-sized states of light that are robust to size and shape perturbations due to a balance of competing attractive and repulsive forces. It has recently been shown theoretically, via a multipole expansion of the nonlocal nonlinearity, that the self-bound state arises due to competition between the s-wave and d-wave nonlinear terms, together with diffraction. The theoretical photon droplet framework encompasses both a solitonlike stationary ground state and the nonsolitonlike dynamics that ensue when the system is displaced from equilibrium, i.e., driven into an excited state. We present numerics and experiments supporting the existence of these photon droplet states and measurements of the dynamical evolution of the photon droplet orbital angular momentum.