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. 2015 May 6;5:9977. doi: 10.1038/srep09977

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Focusing property of the azimuthally polarized beam by planar metalens. (a) Simulated intensity distribution at the focal plane. (b) Experimental recorded intensity distribution at the focal plane. (c) Line-scanning profiles along the diagonal across the focal spot for the simulated (orange line) and measured (green line) results. (d) The intensity distributions under variety collection polarization states. The transmission orientation of the polarizer is indicated by green arrows. False-colour map indicates the relative intensity.