The calculation of subwayelength diffraction optical elements based on gratings with a variable period using high-performance computer systems

摘要

We investigated subwavelength diffraction optical elements based on ring gratings. We conduct numerical simulation of creation and focusing of the second order radially polarized beam and pulsed radiation passed through the subwavelength diffraction grating. The formation of a shadow focal spot in the immediate vicinity of an optical element, amplification of the longitudinal component of the electric field and the inverse energy flow can arise near the optical axis of the element were shown.