Fig. 1. Schematic of the metasurface. (a) Dimensions of the unit cell and (b) 4 × 4 array of the metasurface.

Fig. 2. (a) Magnitude of the co- and cross-polarization components. (b) The magnitude of the PCR spectrum. (c) The phase difference of the co- and cross-polarization components. (d) The magnitude of the axial ratio.

Fig. 3. (a) Reflection coefficients in the u−v basis. (b) The phase difference of the co-polarized reflected wave in the u−v basis. (c) The current distributions of the LIG antenna and the reflector at 0.3 THz. (d) The current distributions at 0.55 THz.

Fig. 4. (a) Schematic of the bent LIG metamaterial. The bending angle is 57°. (b) Simulation results of co- and cross-polarization components and the absorption spectra. (c) The relative impedance of the flat and bent structures.

Fig. 5. Experimental setup and measurement results of the metamaterial. (a) The schematic of the laser (Nd: YVO₄) to produce LIG. (b) The 50 × 50 array of the unit cell. (c) Microscopic view of the metamaterial. (d) The experimental setup for the measurements. (e) The dimensions of the unit cell seen by the optical microscope.

Fig. 6. (a) Measurement results of the reflection intensities and the PCR of the design for 50 × 50 array without the convex shape bending. (b) The measurement results of the absorption spectra for the 50 × 50 array of the unit cell after the convex shape bending.