Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Figure 21

Planar slit array metal lens. (a) Schematic configuration of light focusing of planar metal nanoslit array lens. (b) Normalized Poynting Vector for light focusing of metallic nanoslits lens. (c) Calculated phase distribution of electric field for the designed deflector. Incident and deflection angles are designed as 30° and −30°, respectively. (d) Far-field angular spectrum for the incident and emitted beams, respectively. (e, f) Schematic of the abnormal refraction in other metasurfaces. Figures are reproduced from (a)–(d) [137], (e) [134], and (f) [138].

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