Why this single-chip LED advance could shrink AR glasses and boost quantum links

Researchers at Osaka University, in collaboration with ULVAC, Inc. and Ritsumeikan University, have developed a new LED structure that generates circularly polarized light from a single chip. By combining an InGaN semi-polar light-emitting structure with a band-shaped silicon nitride metasurface, the team created a compact light source that reduces energy conversion loss and operates at room temperature.