Monolithic microcavity-metalens interface generates high-quality photons and manipulates their shape/ direction within a single chip

https://www.eurekalert.org/news-releases/1125988

"front: quantum-dot-micropillar emits bright, identical (crucial for quantum interference) photons... back: metalens hit by photons expand/ shape traveling through semiconductor substrate... cavities make bright photons but little control over beam's final shape/ metalenses incredible control but inefficient photon generation... overcome integrating into single-block... single-photon skyrmion generation, quantum computers/ communication, sensors... no bulky mirrors/ lenses, all prepping done inside chip"