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Light projection displays play an increasingly important role in our modernlife. Core projection systems including liquid crystal displays and digitalmicromirror devices can impose spatial light modulation and actively shapelight waves. Recently, the advent of metasurfaces has revolutionized designconcepts in nanophotonics, enabling a new family of optical elements withexceptional degrees of freedom. Here, we demonstrate a light projection displaytechnology based on optical metasurfaces, called digital metasurface device(DMSD). Each metasurface pixel in a DMSD is electrically reconfigurable withwell-controlled programmability and addressability. The DMSD can not onlycontinuously modulate the intensity of light with high contrast, but also shapethe wavefront of light generated by each metasurface pixel and dynamicallyswitch between arbitrary holographic patterns. Our approach will pave an avenuetowards the development of customized light projection devices. It will alsodrive the field of dynamic optical metasurfaces with fresh momentum andinspiring concepts.

Electrically-controlled digital metasurface device for light projection displays