Two-Dimensional Optical Metasurfaces: From Plasmons to Dielectrics

Figure 4

Schematic representation of a nanoarray. (a) The unit (blue) at the plasmonic interface is composed of 8 metallic V-shaped antennas with a width of 40 nm and a thickness of 30 nm. The repetition period in the x direction is T, and the repetition period in the y direction is T/8. The phase delay of cross-polarized light increases from right to left along the x axis. (b) The scanning electron microscopy images of four antenna array cells with different cycles were produced on a single wafer.

(a)

(b)