Propagation dynamics of radially polarized symmetric Airy beams in the fractional Schrodinger equation

We analyze the propagation dynamics of radially polarized symmetric Airy beams (R-SABs) in a (2+1)-dimensional optical system with fractional diffraction, modeled by the fractional Schrodinger equation (FSE) characterized by the Levy index, alpha. The autofocusing effect featured by such beams becomes stronger, while the focal length becomes shorter, with the increase of alpha. The effect of the intrinsic vorticity on the autofocusing dynamics of the beams is considered too. Then, the ability of R-SABs to capture nano-particles by means of radiation forces is explored, and multiple capture positions emerging in the course of the propagation are identified. Finally, we find that the propagation of the vortical R-SABs with an off-axis shift leads to rupture of the ring-shaped pattern of the power-density distribution. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study focuses on the propagation dynamics of radially polarized symmetric Airy beams in a (2+1)-dimensional optical system with fractional diffraction, analyzing the autofocusing effect and the influence of Levy index on focal length. It also explores the ability of R-SABs to capture nano-particles via radiation forces and the impact of off-axis shift on the power-density distribution pattern during propagation.