The investigation of the cylindrically polarized beams focusing by a diffractive axicon using high-performance computer systems

The study of the influence of tight focusing on the spatial distribution of the electric field components of Gaussian beams with first-order cylindrical polarization (radial, azimuthal, and hybrid) is carried out. The cylindrical- polarized beams were focused by a high-aperture diffraction axicon. Numerical simulation of the diffraction of the beams under consideration was carried out using the finite difference time domain method (FDTD) using high-performance computer systems.