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Fig. 4 | Nanoscale Research Letters

Fig. 4

From: Spin-Independent Plasmonic Lens

Fig. 4

For semicircular slits with Δr = λsp, SPP vortexes excited by LCP (a) and RCP (b) exhibit opposite topological charges. The change of the radius and central angle will not affect the spin-independent SPPs focusing (c, d). The proposed approach is also suitable for spiral slits (e, f)

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