Figure 2
Schematic of the wave propagation in a dual-wavelength achromatic metasurface.
It is required that the total phase accumulation φtot should be kept constant at the two wavelengths.
Figure 2 | Scientific Reports
Schematic of the wave propagation in a dual-wavelength achromatic metasurface.
It is required that the total phase accumulation φtot should be kept constant at the two wavelengths.
