Two-Dimensional Optical Metasurfaces: From Plasmons to Dielectrics

Figure 9

(a, b) Diagram of electric field in plasmonic resonator; (c) diagram of electric field in dielectric sphere. The plasmonic rod antennas only stand by electrical resonances and can ignore magnetic contributions. In plasmonic particles, metal rods are formed into a split ring resonator, which can realize strong magnetic dipole resonance [20].

(a)

(b)

(c)