Fig. 6: Transmittance and diffraction characteristics of a spiral zone plate (SZP). | Communications Physics

Fig. 6: Transmittance and diffraction characteristics of a spiral zone plate (SZP).

From: Galactic-form spinning beams

Fig. 6

a Transmittance of an SZP with topological charge ℓ = 3. b, c present one-dimensional cross-sectional profiles of the SZP in the radial and azimuthal directions, plotted at θ = π/4 rad and r = 3 mm, respectively. d Simulated diffraction pattern resulting from a plane wave diffraction through the SZP shown in (a). See also Supplementary Movie 5 for the full propagation dynamics.

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