A nanoscopic metaatom can be switched on and off with electricity to create holograms that can be rewritten instantly.
April 23, 2026
Original Paper
An electrically tunable metaatom for visible light
arXiv · 2604.20605
The Takeaway
Most surfaces that bend or manipulate light are static and cannot be changed once they are manufactured. This new nanostructure uses a small voltage to toggle its optical properties in the visible light spectrum. This makes it possible to create digital physical optics where the lens or hologram can update in real-time. It moves us closer to dynamic holographic displays that don't rely on bulky projection systems. The ability to control light at this scale with a simple electrical pulse will revolutionize how we design smartphone cameras and displays.
From the abstract
Phase-gradient metasurfaces provide powerful wavefront control through two-dimensional arrangement of nanostructures acting as metaatoms. While dynamic tuning forms a major driver for future breakthroughs and applications in this area, current metaatoms are generally static or limited to operation in the infrared. Here, we present a metaatom that is both electrically tunable and operates in the visible. Its function originates from an excitonic absorption band of a dedoped conducting polymer, wh