Metasurface: Multi-element optical system design

Metasurfaces that control the amplitude, phase and polarization of light are two-dimensional ultra-thin optical components consisting of nanoscatterers. In this paper, we demonstrate a triplet zoom system by using three different planar lenses (metalenses) working at 600 nm. The movement of metalenses provide three f# values: 1, 1.25, 1.5 and three focal length values: 20, 25, 30 μm, while total thickness does not change. Our design of triplet zoom system shows that zoom systems could be realized with metasurface applications.