Nanoscale, energy efficient method creates quantum entangled photon pairs; could transform computing, telecommunications, and sensing

https://www.eurekalert.org/news-releases/1070348

"bridges macroscopic/ microscopic, high performance nonlinear/ quantum optics... scalable, highly efficient on-chip integrable devices such as tunable 3.4 µm thick entangled-photon-pair generator on silicon chip... 6 layers thin crystal van der Waals semiconducting transition metal molybdenum disulfide, with each piece rotated 180° relative to layers above/ below (periodic poling)... quasi-phase-matching manipulates properties introduced light, creating paired photons... satellite-based distribution, smartphone quantum communication"