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Abstract Metasurfaces have drawn enormous attention in both the physics and engineering communities owing to their capabilities of arbitrarily manipulating the electromagnetic waves at subwavelength scale. One of the promising applications of metasurfaces is the realization of high‐quality holograms. However, due to the passive response of metasurface resonators, previous demonstrations on meta‐holography were mainly limited to generating static images. Seeking new approaches to realize active control over meta‐holograms is highly demanded for display applications, such as holographic movies. Here, a broadband active meta‐holography which enables temperature‐dependent dynamic holographic imaging is experimentally demonstrated. The meta‐hologram consists of two sets of resonators: set 1 is passive, being composed of simple metallic C‐shape split‐ring resonators (CSRRs) and set 2 is active, being composed of vanadium dioxide (VO 2 ) integrated CSRRs (V‐CSRRs). Each set generates certain holographic images with predesigned amplitude and phase distributions. Under external heating, the insulator‐to‐metal transition property of VO 2 will gradually short out the V‐CSRRs and their responses, thus dynamically changing the overall generated holographic image. The proposed approach presents a new way of tunable metasurface design and holds promise for active meta‐devices with versatile functionalities.
Liu et al. (Sun,) studied this question.