Tunable metasurface on multimode optical fiber enabled by wavefront shaping

We combine the advantages of optical metasurfaces and multimode fiber wavefront shaping to create all-on-fiber devices with actively reconfigurable optical outputs. A spatially-varied arrangement of distinct phase gradient metasurfaces enables the off-axis deflection of focused spots and collimated Gaussian beams to a smoothly-variable angle of up to 70°. Our initial results demonstrate the potential of this device archetype, and show promise for extreme field-of-view enhancement, miniaturization, and multifunctionality for a variety of endoscopic imaging applications.