Two-Dimensional Optical Metasurfaces: From Plasmons to Dielectrics

Figure 5

Applications of optical metasurface. (a) Metasurface acts as a chemical sensor: the molecules are attached to the metasurface, resulting in the transfer of resonances of the nanoantennas components. This leads to anomalous reflection and transmission beam angle changes (indicated by and , respectively). (b) Schematic diagram of a superrefractive index medium consisted of 3 metasurfaces (left panel). The right panel displays the cumulative phase transition of light passing through a common homogeneous material (green line) and through a medium consisting of 3 metasurfaces (red polyline), the slope of every red polyline representing the effective refractive index.

(a)

(b)