|
This article is cited in 1 scientific paper (total in 1 paper)
DIFFRACTIVE OPTICS, OPTICAL TECHNOLOGIES
Minimal focal spot obtained by focusing circularly polarized light
S. S. Stafeevab, V. D. Zaitsevab, V. V. Kotlyarab a Image Processing Systems Institute of the RAS - Branch of the FSRC "Crystallography and Photonics" RAS, Samara, Russia, Samara
b Samara National Research University
Abstract:
In this paper, using the Richards-Wolf equations, we analyze focusing circularly polarized light with flat diffractive lenses. It is shown that as the numerical aperture of the lens increases, the size of the focal spot first decreases and then begins to grow. The minimum focal spot is observed at NA=0.96 (FWHM=0.55$\lambda$). With a further increase in the numerical aperture of the lens, the growth of the longitudinal component leads to an increase in the size of the focal spot. When the flat diffractive lens is replaced by an aplanatic lens, the size of the focal spot decreases monotoni-cally as the numerical aperture of the lens increases.
Keywords:
tight focusing, Richards-Wolf formulas, polarization conversion, flat-top focus
Received: 26.10.2022 Accepted: 05.12.2022
Citation:
S. S. Stafeev, V. D. Zaitsev, V. V. Kotlyar, “Minimal focal spot obtained by focusing circularly polarized light”, Computer Optics, 47:3 (2023), 361–366
Linking options:
https://www.mathnet.ru/eng/co1134 https://www.mathnet.ru/eng/co/v47/i3/p361
|
Statistics & downloads: |
Abstract page: | 13 | Full-text PDF : | 11 | References: | 3 |
|