Investigation of the vortex laser beam shift relative to the optical element using high performance computer systems

Abstract

Abstract The spatial distribution of the Gauss-Laguerre beams with circular polarization is investigated subject to the beam position relative to the element, the axicon numerical aperture and order of the vortex phase in the 3D model. Modeling of diffraction is numerically investigated by the finite difference time domain (FDTD) method using high-performance computing. It is shown that using the diffraction axicon, polarization transformations can be carried out in the near zone, which, in particular, is expressed that the number of dark bands corresponds to the m (vortex laser beam number).