Fig. 2: Comparison of beam size dependence on topological charge between Laguerre-Gaussian beam (LGB) and achromatic non-diffracting perfect vortex beam (ANPVB). | Nature Communications

Fig. 2: Comparison of beam size dependence on topological charge between Laguerre-Gaussian beam (LGB) and achromatic non-diffracting perfect vortex beam (ANPVB).

From: Ultrabroadband, achromatic, and non-diffracting perfect optical vortex generation via radial momentum control in dielectric metasurfaces

Fig. 2: Comparison of beam size dependence on topological charge between Laguerre-Gaussian beam (LGB) and achromatic non-diffracting perfect vortex beam (ANPVB).

a1–c1 Intensity and (a2–c2) phase profiles at z = 18 mm of the LGBs with l = 1, 15 and 30, respectively. d1–f1 Intensity and (d2–f2) phase profiles at z = 18 mm of the proposed ANPVB of (α = 18, β = 0.8, γ = 3, t = 700, δ = 1, R = 0.54 mm, l = 1, 15 and 30) respectively. The scale bars in (a1) and (d1) represent 1 mm and 0.3 mm, respectively.

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