Electrically tunable space-time metasurfaces at optical frequencies, a path to wireless communication channels

https://phys.org/news/2024-07-tunable-metasurface-optical-space-path.html

"120 X 120 µm metasurface of tunable gold antennas with underlying electrically tunable indium tin oxide semiconductor layer: 1 incoming beam reflects many sidebands (channel) with different destinations/ optical frequencies... controlling flat nanoscale element array of different voltages focusing light (lens-like) or reflect it (mirror-like) to these devices and tune between different passive functionalities...  1,530 nm reflection mode optical frequency enabling huge bandwidth... future: LiDAR applications, space missions"