Reconfigurable step-zoom metalens without optical and mechanical compensations

• DOI: 10.1364/oe.27.012221
• Publication Date: 2019-04-17T22:31:27Z
• Authors: Rao Fu; Zile Li; Guoxing Zheng; Ming Chen; Yan Yang; Jin Tao; Lin Wu; Qiling Deng
• Keywords: Monochromatic color; Digital micromirror device; Spatial light modulator

A polarization-dependent metasurface that consists of nanobrick arrays with spatial varying dimensions in two orthogonal directions has shown independent phase control ability, which paves a new way to design reconfigurable step-zoom lens different focal lengths depending on the polarization states an incident beam. In this paper, we report highly integrated metalens dual based double-sided metasurfaces sitting transparent substrate. By assigning power and balancing aberrations between front rear metasurfaces, large field-of-view ( ± 20°) corrected for monochromatic was designed, its high performance (nearly diffraction-limited image quality both on-axis off-axis imaging) verified by full-wave numerical simulations. More interestingly, plane designed keeps unchanged after zoom switching, will bring great convenience practical applications. With advantages such as ultra-compactness, flexibility, simplicity, proposed indicates potential fields require imaging beam focusing without optical mechanical compensations.