Research team develops multifunctional vortex beam for UV-visible spectra

https://phys.org/news/2023-03-team-multifunctional-vortex-uv-visible-spectra.html

"metasurface independently controlling 2 orthogonal polarization states across UV to visible light wavelengths... create and detect vortex beams with different topological charges using metasurface... silicon nitride has high refractive index and no UV absorption... broke rotational symmetry... different functions depending on polarization of incoming light. This approach allows for more information to be stored on a single metasurface, opening up potential...  multifunctionality of metasurfaces"