Open AccessComparison of the focused optical vortices produced by high-aperture phase conventional and spiral zone plates
Author(s) -
A. A. Savelyeva,
Е. С. Козлова,
V. V. Kotlyar
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2103/1/012175
Subject(s) - zone plate , optics , optical vortex , physics , topological quantum number , gaussian beam , spiral (railway) , phase (matter) , beam (structure) , aperture (computer memory) , focus (optics) , diffraction , mathematical analysis , mathematics , quantum mechanics , acoustics
Using the FDTD simulation, sharp focusing of a linearly polarized Gaussian beam with an embedded topological charge m = 3 by a phase zone plate and focusing of a Gaussian beam by a phase spiral zone plate with topological charge m = 3 were studied. The obtained results showed that proposed elements formed different patterns of intensity at a focal plane. The spiral zone plate forms a focal spot with three petals. At a distance of 13.5 μm from the focus, the lobe structure of the intensity (and energy flux) is replaced by an annular distribution.