Figure 1

Schematics of dielectric metasurfaces comprising periodical arrays of (a) APBs, (b) alternately flipped APBs, (c) SAPBs and (d) alternately flipped SAPBs with gaps in the middle.

Schematics of dielectric metasurfaces comprising periodical arrays of (a) APBs, (b) alternately flipped APBs, (c) SAPBs and (d) alternately flipped SAPBs with gaps in the middle.