Fig. 1. Schematic view of (a) single slit resonator and (b) a pair of slit resonators. (c) Calculated normalized amplitude and (d) phase distributions of the SWs excited by a pair of slit resonators at various θ1 and θ2 (here, LCP incidence was taken as an example).

Fig. 2. (a) Calculated, (c) simulated, and (e) measured V-shaped SW intensity profiles (|Ez|2) rebuilt under LCP incidence, respectively. (b) Calculated, (d) simulated, and (f) measured N-shaped SW intensity profiles (|Ez|2) rebuilt under RCP incidence, respectively. Scale bar: 0.8 mm.

Fig. 3. Simulated spectra and SW field distributions (|Ez|) of (a), (b) slit resonator array, (c), (d) split-ring-shaped slit resonator array, and (e), (f) coupled slit-pair resonator array under the x-polarization incidence, respectively. The insets in the top–left corner represent the corresponding unit elements similarly hereinafter. Scale bar: 1 mm.

Fig. 4. (a)–(e) Simulated and (f)–(j) measured field intensity distributions (|Ez|2) of coupled slit-pair resonator-based metalens with different vertical distances, respectively, under x-polarization incidence. Scale bar: 1 mm.

Fig. 5. (a) Schematic and (b) sample image of the SSR pair; scale bar: 25 μm. The subscript and superscript of A represent the SW propagating direction and SSR number, respectively. (c)–(f) Measured SW field distributions in the case of the x-polarized, y-polarized, LCP, and RCP incidences, respectively. Scale bar: 1 mm.