Ultrafast beam-steering breakthrough

https://phys.org/news/2023-03-ultrafast-beam-steering-breakthrough.html

"semiconductor metasurface embedded quantum dots... using control optical pulse, reconfigure way surface reflected light and steer in different directions over 70° range for less than trillionth-of-second... steered beam restrained tendency of incoherent light to spread over wider viewing angle... produced bright light at distance... brighten military helmet screens used to overlay maps or blueprints over ordinary vision, holograms, remote sensing, self-driving cars and high-speed communication"

Related:A precise technology for the measurement of the optical coherent structure of random lights

https://phys.org/news/2023-03-precise-technology-optical-coherent-random.html