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Fig. 9

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(a). Schematic of meta-axicon based on a 100%-efficiency PB meta-atom in ABA configuration for Bessel beam generation with high efficiencies. (b),(c) FDTD simulated and measured Ey field distributions on the xz-plane at the transmission side of the designed BB generator at 11.8GHz, respectively (d) Experimental verification of self-healing effect of the generated BB based on Ey distribution of the meta-axicon with presence of a metallic sphere (diameter D=15mm). all figures reproduced with permission from [28] © 2018, AIP.

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