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Schematic configuration of the chiral metamirrors consisting of the nanobrick and the wire grating in the same plane for breaking mirror symmetry and the n-fold (n > 2) rotational symmetry. A unit cell of the metasurface consists of a gold structure which is separated from a thick gold reflector by a thin SiO2 spacer. Geometrical parameters: P = 250 nm, g = l = 70 nm, w = 190 nm, ts = 130 nm, tAu = 200 nm.
