The dynamics of the inward-focusing ring Pearcey–Gaussian (PeG) beam are investigated in nonlocally defocusing nonlinear media. The propagation of inward-focusing ring PeG beams exhibits an anomalous abrupt focusing behavior, which is also controllable by carefully adjusting the degree of the nonlocality. Interestingly, the position of the focus spot changes exponentially with the amplitude of the beam. Such findings have benefits for optical tweezers in nonlinear regimes.

中文翻译：

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非局部散焦非线性介质中环形Pearcey-Gaussian光束的可控突然聚焦

在非局部散焦非线性介质中研究了向内聚焦环皮尔斯-高斯（PeG）光束的动力学。向内聚焦环形PeG光束的传播表现出异常的突然聚焦行为，这也可以通过仔细调整非局部性的程度来控制。有趣的是，焦点的位置随光束的振幅呈指数变化。这些发现对非线性环境中的光镊具有益处。