Propagation of the radially polarized Airy vortex beams in uniaxial crystals orthogonal to the optical axis

Abstract

We introduce the radially polarized Airy vortex beams (RPAiVBs) and analytically study their propagation in uniaxial crystals orthogonal to the optical axis. We mainly discuss the effects of the vortex and the ratio of the extraordinary index (n_e) to the ordinary index (n_o) on the propagation properties of the RPAiVBs involving the intensity distributions, the maximum intensity, the radiation forces, the trajectory, and the velocity. The RPAiVBs evolve into the beams produced by the x direction electric field (RPAiXVB) and the y direction electric field (RPAiYVB). It is shown that with the increase in the order of the vortex, the maximum intensity and the radiation forces of the RPAiVBs are greatly enhanced; besides, the intensity focusing position of the RPAiVBs is farther. Furthermore, with the ratio of n_e to n_o increasing, the trajectory of the RPAiXVBs is farther from x=0 mm, and the acceleration is bigger in the x-z plane, but they are opposite in the y-z plane.