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

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.

Toward the capacity limit of 2D planar Jones matrix with a single-layer metasurface

“…Recently, the simultaneous amplitude and phase control has been used for the integration of printing and holographic images (19)(20)(21)(34)(35)(36). Therefore, our design approach can encode three sets of printing and holographic images into the three components of the Jones matrix of the single metasurface (Fig.…”

Multidimensional Information Encryption and Storage: When the Input Is Light

“…From the view of the above-mentioned system consisting of the input, the material, and the output, the multiple dimensions of information can correspond to the multidimensional input or the multidimensional output to provide a high level of information security. In the output side, multidimensional information usually displays in the form of light, which can be further classified into the dimensions of wavelength [ 17 , 18 ], spectra [ 19 , 20 ], time [ 21 , 22 ], viewing angle [ 23 , 24 ], or spatial position [ 25 , 26 ]. More interesting works are based on the diversity at the input side that can be in the form of light [ 27 – 31 ], thermal [ 32 , 33 ], electricity [ 34 ], or chemical reagents [ 35 – 37 ].…”

Vanadium Dioxide for Dynamically Tunable Photonics

“…Finally, if the material that the structures are made from can be manipulated, the optical response of the devices can be controlled at will. This has been proven through doped semiconductors, where the pumping of electrons changes the optical properties, [31] and the hydrogenation of metals, where the state of the material is changed chemically [32] . More recently, novel phase‐change materials (PCMs) have been employed as an actively controllable material in photonic devices [33,34] …”

“…This means that after the external stimulus is removed, the material continues to exist in its current state. These PCMs have been shown to have long lifetimes, fast switching speeds, and exhibit notable changes in the optical properties in their different states, making them extremely attractive for applications in memory, [35–37] displays, [32,38] and other actively switchable photonic devices. A more in‐depth review article that discusses photonic applications of GST from visible to THz wavelengths can be found in Ref.…”