Figure 1
Design principle of the planar meta-mirror BB′ and the convex meta-mirror DD′. B and B′ on the planar meta-mirror are very closed to each other in positions with small variations of dx. D and D′ on the convex meta-mirror are very closed to each other in positions with small variations of dx and dy. dΦ refers to the phase variation between these two poisons of B(D) and B′(D′) on the meta-mirrors. The black rays refer the incidences and the normal behavior of the positive reflections. The red rays refer to the negative reflections.
