Abstract
The dynamics of the inward-focusing ring Airy beam in the defocusing nonlinear media is investigated. It is found an interesting phenomenon that the propagation of the inward-focusing ring Airy beam exhibits a “funnel” when the beam intensity is sufficiently high. Additionally, the focus spot of such a funnel beam monotonously changes with the nonlocality of the media. The gradient force of the funnel beam is also studied in detail. The findings may pave the way to the optical tweezers in the nonlinear regime.
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