Abstract
Results of numerical simulation of binary phase Fresnel zone plates (FZPs) with a mesowave length size and a large aperture angle (NA ∼ 1) are presented. The study is aimed at revealing the main features in the formation of the spatial near-field structure, as well as optimization of FZP parameters for obtaining maximally intense foci. It is shown that dimensional parameters of the FZP focal region turn out to be sensitive both to the zone etch depth and to the type of constructive design of the plate. An increase in the number of plate zones leads to the formation of local outer foci of the plate with a higher intensity.
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This work was supported by the Ministry of Science and Higher Education of the Russian Federation (V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences).
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Translated by A. Nikol’skii
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Geints, Y.E., Panina, E.K., Minin, O.V. et al. Light Focusing by a Binary Fresnel Zone Plate with Various Design Features. Atmos Ocean Opt 34, 714–721 (2021). https://doi.org/10.1134/S1024856021060099
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DOI: https://doi.org/10.1134/S1024856021060099