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As two-dimensional metamaterials, metasurfaces open up new avenues fordesigning static planar optics. However, the dynamic modulation of metasurfacesin the optical band is required for practical applications. The existingdynamic devices rarely utilized the polarization manipulation capability ofmetasurfaces. Here, we demonstrate an electrically tunable multifunctionalmetasurface in the visible range by integrating birefringent liquid crystals(LCs) with all-dielectric metasurfaces based on a novel packaging scheme. Bycombining the helicity-dependent geometric phase of the metasurface and thepolarization control ability of LC molecules, continuous intensity tuning andswitching of two helicity channels are realized. Electrically tunablesingle-channel switchable metaholograms, multicolor multiplexed metaholograms,and dynamic varifocal metalenses are designed to verify the concept. Theexploration of polarization control in dynamic tuning can pave the way fordynamic metasurface devices in various applications, such as space lightmodulators, light detection and ranging systems, and holographic displays.

Electrically Tunable Multifunctional All-Dielectric Metasurfaces Integrated with Liquid Crystals in the Visible