Magnesium-Based Metasurfaces for Dual-Function Switching between Dynamic Holography and Dynamic Color Display

TL;DR

This paper introduces a magnesium-based metasurface capable of dynamically switching between holography and color display by utilizing reversible phase transitions, advancing multifunctional optical display technology.

Contribution

It presents a novel, tunable metasurface device that combines dynamic holography and color display functionalities using magnesium's reversible phase change.

Findings

Achieved reversible switching between holography and color display

Utilized magnesium's phase transition for tunability

Generated high-quality holograms and color prints

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.