Tailoring Orbital Angular Momentum of Light in the Visible Domain with Metallic Metasurfaces
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![Figure 1. SEM images of a–c) fundamental [ = − 1/ 2] and d–f) high-order [m = − 5] metasur- metasur-faces with thickness h = 300 m, diameter Dμ = 100 m, grating period μ Λ = 500 nm, and slit width W = 160 nm](https://thumb-eu.123doks.com/thumbv2/123doknet/14531598.533737/3.891.75.542.107.581/figure-images-fundamental-metasur-metasur-thickness-diameter-grating.webp)
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