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Vast tunable optical components are realized based on dynamicreconfigurations of the incident wavefronts, such as beam steering and tunablelens. However, the dominant paradigm of current wavefront reconfigurationtechnologies relies on complex control systems with degrees of freedom muchlarger than output wavefronts, e.g. beam steering based on spatial lightmodulator or phased array antennas. Here, we propose a new paradigm for dynamicreconfiguration of arbitrary output wavefronts using control systems with thesame degrees of freedom. As an example, a wavefront transformer is demonstratedusing an in-plane two-degree-of-freedom (2DOF) mechanical actuation system ofmetasurface doublet for semi-omnidirectional beam steering, which measured a6-kHz modulation speed and a "+-65.6 degree" field of view. This paradigm canbe applied to metasurface transformers for dynamic wavefront reconfigurationwith any control system for vast applications, such as tunable lens, beamsteering, and dynamic beam profiler, just to name a few.

Dynamic wavefront transformer based on a two-degree-of-freedom control system for 6-kHz mechanically actuated beam steering