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. 2020 Sep 24;10:15677. doi: 10.1038/s41598-020-72668-2

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© The Author(s) 2020

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Small scale design of the wide-angle metalens. (a) Ideal target phase; (b) ideal target phase (with 2π subtraction); (c) centre point of different angles; and (d) angles incident from the substrate to metalens.