Abstract
Metasurface-based color display and holography have greatly advanced the state of the art display technologies. To further enrich the metasurface functionalities, recently a lot of research endeavors have been made to combine these two display functions within a single device. However, so far such metasurfaces have remained static and lack tunability once the devices are fabricated. In this work, we demonstrate a dynamic dual-function metasurface device at visible frequencies. It allows for switching between dynamic holography and dynamic color display, taking advantage of the reversible phase transition of magnesium through hydrogenation and dehydrogenation. Spatially arranged stepwise nanocavity pixels are employed to accurately control the amplitude and phase of light, enabling the generation of high-quality color prints and holograms. Our work represents a paradigm toward compact and multifunctional optical elements for future display technologies.
Highlights
Metasurface-based color display and holography have greatly advanced the state of the art display technologies
Color printing and holography are separately implemented on metasurface devices
We demonstrate a metasurface device, which allows for dual-function switching between dynamic holography and dynamic color display
Summary
Metasurface-based color display and holography have greatly advanced the state of the art display technologies. Research endeavors have been exerted to combine these two display functions within a single metasurface device.[18−22] For example, monolithic stepwise nanocavity and holographic metasurface layers have been stacked together to achieve low-crosstalk color printing and full-color holography.[19] In addition, singlelayer dielectric metasurfaces have been employed to combine color printing and holography.[18,20,22] these two strategies suffer from low efficiency and polarization sensitivity, respectively These metasurfaces are intrinsically static, as their optical functions are fixed once the devices are fabricated. Such reversible metal to dielectric transitions are accompanied by dramatic optical response changes, which lay the foundation for building dynamic optical devices in the visible wavelength regime
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