Silicon nanopillars for quantum communication

https://phys.org/news/2022-09-silicon-nanopillars-quantum.html

"simplest form of light wave-guiding structure: silicon nanopillars on chip... bombarded nanopillars with carbon ions... generated photon sources embedded in pillars... Per square millimeter chip, thousands of silicon nanopillars conduct and bundle the light from the sources by directing it vertically through the pillars... varied diameter pillars... even for thinnest pillars dose carbon bombardment too high... now it's just short step to single photon sources"