Fig. 1. Large field of view, achromatic, zoom metalenses

Fig. 2. Generalized Fresnel's law optical path diagram^[3]

Fig. 3. (a) The incident light is x-polarized light, and the stepping zoom metalens is focused on the pattern^[14]; (b) The incident light is y-polarized light, and the step zoom metalens is focused on the lens^[14]; (c) On-chip wide FOV metalenses^[10]

Fig. 4. (a) Structural diagram of a perpendicular curve light field metalens^[35]; (b) Focus diagram of perpendicular curve light field metalens^[35]; (c) Ray trajectories through the lens^[35]; (d) Focusing diagram of metalenses based on the surface of disordered media^[36]; (e) Focus view of a single-layer large-field metalens in the mid-infrared band^[37]; (f) Light intensity distribution of a single-layer large-field metalens in the mid-infrared band along the z-axis^[37]

Fig. 5. Device architecture and metalens fabrication^[38]. (a) Schematic of the optical setup for MIID; (b) Photograph of the highly compact MIID; (c) Top-view optical microscope image and side-view SEM image of the fabricated

Fig. 6. (a) Three layer metal metasurface structure ^[43]; (b) Metal metalenses for color imaging demonstration^[43]; (c) Focus view of a metal metalens^[43]; (d) Focus view of a multi-region metalens ^[44]; (e) Focus view of a graphene oxide metalens^[45]

Fig. 7. (a) Focusing diagram of a metalens of complementary structure and its imaging^[46]; (b) Focus diagram of an elliptical cylindrical metalens^[48]; (c)Focus diagram of a hexagonal structure metalens^[49]; (d) Focus diagram of a rectangular structure metalens^[51]

Fig. 8. (a) Metalenses anisotropic nanostructured for imaging of resolution test maps of the USAF^[53]; (b) Focus diagram of an anisotropic nanostructured metalens^[53]; (c) Structural diagram of mid-infrared achromatic metalens^[54]; (d) Mid-infrared achromatic metalens focus diagram^[54]; (e) Structural diagram of Longwave infrared achromatic metalens^[54]; (f) Longwave infrared achromatic metalens focus diagram^[54]; (g) Schematic diagram of the odd-ring metalens and the combined metalens and their corresponding light intensity along the z-axis^[56]; (h) Multi-region metalens focus diagram^[56]

Fig. 9. (a) Schematic diagram of Ge₂Se₂Te₅ metalens^[64]; (b) Focusing diagram Ge₂Se₂Te₅ metalens^[64]; (c) Schematic diagram of Sb₂Se₃ metalens^[13]; (d) Focusing diagram based on Sb₂Se₃ metalens^[13]

Fig. 10. (a) Focusing diagram of a large chromatic aberration dispersion zoom metalens^[65]; (b) Large chromatic aberration dispersion zoom metalens imaging test for USAF resolution test diagram^[65]; (c) Structural diagram of a double-layer metasurface zoom lens^[67]; (d) Comparison of theoretical and actual focal lengths at different rotation angles of metasurfaces^[67]