Fig. 1. Schematic of metalenses structure. (a) Single-period nanostructure; (b) side view of metalenses with aperture of D

Fig. 2. Flowchart of metalenses design simulation software

Fig. 3. Relationship among size of element structure, phase, and transmittance

Fig. 4. Electromagnetic response diagram of single nanostructure. (a) Electric field distribution of top view of single nanostructure; (b) magnetic field distribution of top view of single nanostructure

Fig. 5. Construction and performance simulation of metalens. (a) Top view of metalens array with aperture D=15 μm and focal length f=10 μm; (b) y=0, focal line of transmitted light in x-z plane

Fig. 6. Software interface diagram and simulation result diagram