Leaky-wave metasurfaces link free-space optics and integrated photonics

https://www.laserfocusworld.com/optics/article/14294801/leakywave-metasurfaces-link-freespace-optics-and-integrated-photonics

"controls optical degrees freedom: amplitude, phase, polarization ellipticity, and polarization orientation...  nanostructured polymer layer on top of silicon nitride film, 2 sets meta-atoms... single free-space wave completely and independently control amplitude, phase, polarization orientation, and polarization ellipticity... hybrid free-space optics shaping light wavefront and integrated photonics for optical data processing, quantum optics, optogenetics, sensor networks, inter-chip communications, and holographic displays"

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