Fig. 1. （a） Geometric-phase-based metalens in this paper： （a）Geometric-phase-based metasurface realizing polarization-switchable wavefront controlling and multi-functions multiplexing in the longitudinal direction； （b）Geometric-phase-based metasurface realizing polarization-switchable wavefront controlling and multi-functions multiplexing in both longitudinal and transverse directions； （c）Polarization conversion efficiency of anisotropic metrasurface unit； （d） Phase difference between the long and short axes of anisotropic metasurface units，where the insertion chart is a schematic of single metasurface unit.

Fig. 2. （a）-（e） Distribution of electric field intensity and phase of the metalens under left-handed circularly-polarized （LCP） incidence； （f）-（j） Distribution of electric field intensity and phase of the metalens under right-handed circularly-polarized （RCP） incidence；（a）Distribution of electric field intensity in the x-z plane under left-handed circularly-polarized （LCP） incidence； （b），（d） Distribution of electric field intensity in the x-z plane at z=28.5 μm （b） and z=65 μm （d）； （c），（e）Distribution of electric field phase in the x-z plane at z=28.5 μm （c） and z=65 μm （e）； （f）Distribution of electric field intensity in the x-z plane under right-handed circularly-polarized （RCP） incidence； （g），（i） Distribution of electric field intensity in the x-z plane at z=28.5 μm （g） and z=65 μm （i）； （h），（j）Distribution of electric field phase in the x-z plane at z=28.5 μm （h） and z=65 μm （j）；

Fig. 3. [in Chinese]