Gesture-Interactive Dynamic Holo-Display via Topography Flexible Metasurfaces

Heading toward the next-generation intelligent optical device, the meta-optics active tunability is one of the most desirable properties to expand its versatility beyond the traditional optical devices. Despite its advances via various tunable approaches, the encoding freedom of tuning capability still critically restricts its widespread engagement and dynamics in real-life applications. Here, we present a gesture-interactive scheme by topography flexible metasurfaces (TFMs) to expand the encoding freedom for the tuning capability. Through regulating different surface topographies, the potential tuning degree of freedom (DoF) has been fully explored to dynamically display/encrypt up to 16 independent holographic images, exceeding the state-of-the-art tuning DoF. Such topography flexibility is interactively tuned with gesture triggers, manual bending, and other large-area repeatable controlling methods to extract and display the respective holographic images. We envision that this research stimulates active meta-device innovation and suggests potential applications in next-generation interactive displays, information storage and encryption, and wearable optical devices.