Fig. 1. Scheme of the unit cell and corresponding coordinate system.

Fig. 2. (a), (c), and (e) Calculated and (b), (d), and (f) simulated transmittance spectra of the nanostructure corresponding to the different angles of rotation for y polarization. Here, the solid red (dashed green) curves represent the SPPs of the interface between metal and glass (metal and air); the blue solid curves represent the simulated spectra.

Fig. 3. Coordinate vector picture of the metasurface.

Fig. 4. (a) and (b) Schematic diagrams of our supercell. (c) SEM image of the sample with scale bars of 1000 and 800 nm.

Fig. 5. (a) and (b) Calculated, (c) and (d) simulated, and (e) and (f) measured spectra of metasurface.

Fig. 6. (a) Transmittance intensity, (b) reflection intensity, (c) transmittance phase, and (d) reflection phase diagrams of the test metasurface with nanoslit rotation angles under normal incident plane wave with y polarization.