Fig. 6

Electrically reconfigurable and tunable metasurfaces a Active Huygens’ metalens controlled by multichannel DC voltage sources [85], b MEMS Fano metasurface with multiple-input–output states for logic operations [86], c Metasurface with graphene ribbon array on a nonplanar surface [87], d Liquid–crystal-loaded chiral metasurfaces for reconfigurable multiband spin-selective light absorption [88], and e Ultrathin optical modulator based on a tunable metasurface absorber operating in mid-infrared range [89]