ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,913, issued on Feb. 10, was assigned to Shphotonics Ltd (Suzhou, China).

"Metasurface optical device and fabrication method thereof" was invented by Xinzheng Yang (Sammamish, Wash.), Lei Sun (Suzhou, China) and Bing Qiu (Suzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A metasurface optical device includes a substrate, a film layer, and a metasurface structural unit array. The substrate includes a first surface and a second surface opposite to each other in a thickness direction of the substrate. The film layer is formed on the first surface of the substrate and includes at least one film group of films distributed at different positions...