Propagation of Pearcey Gaussian beams in a strongly nonlocal nonlinear medium

Abstract

We introduce the propagation of Pearcey Gaussian (PG) beams in a strongly nonlocal nonlinear medium (SNNM) analytically. Our results show that PG beams propagating in the SNNM have two different focusing positions. The intensity peak appears at different focusing positions depending on the selection of the nonlinear parameters. In addition, the effects of the nonlinear parameters and the scaling factor on the trajectory, the position of the intensity focusing, the intensity evolution between focus locations, and the radiation force are studied.

Virtual Source of a Swallowtail Beam

“…[12] The form-invariant and the auto-focusing features during propagation make it applicable in many aspects. [13][14][15][16] According to the unique geometric structure, other five catastrophe lights determined by its potential function have been established in theory, which are given in increasing order: swallowtail, butterfly, elliptical umbilic, hyperbolic umbilic, and parabolic umbilic. [17][18][19] According to the far-field divergent angle expression [20] 𝜃 =…”