a, Schematics of our proposed meta-device to generate a vortex beam with varying ellipticity. b, Interference pattern between transmitted light and a spherical wave, recorded by our CCD. c, The SEM ...
(a) Schematics of the experimental setup for electron and photon scattering. (b) An atomic model of the pattern formed by the twisted bilayer graphene (30°-tBLG) crystal structure. (c) A low-energy ...
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