We study the abruptly autofocusing and autodefocusing properties of the circular Airy Gaussian vortex (CAiGV) beams in strongly nonlocal nonlinear medium for the first time through numerical simulations. The magnitude of topological charges and the position of the vortex could change not only the light spot pattern but also the intensity contrast. Meanwhile, we can change the position of the autofocusing and autodefocusing planes by changing the parameter of the incident beam. Furthermore, we can control the peak intensity contrast through choosing properly the truncation factor. As for the radiation force, we study the gradient and the scattering forces of CAiGV beams on Rayleigh dielectric sphere. Our analyses demonstrate that the radiation force can be enhanced by choosing proper parameters of CAiGV beams.

我们首次通过数值模拟研究了圆形艾里高斯涡旋（CAiGV）光束在强非局部非线性介质中的突然自聚焦和自散焦特性。拓扑电荷的大小和涡旋的位置不仅可以改变光斑图案，还可以改变强度对比。同时，我们可以通过改变入射光束的参数来改变自聚焦和自散焦平面的位置。此外，我们可以通过选择截断因子来控制峰值强度对比度。至于辐射力，我们研究了 CAiGV 光束在瑞利电介质球上的梯度和散射力。我们的分析表明，可以通过选择适当的 CAiGV 光束参数来增强辐射力。