Nanophotonic researchers developed a 3D optical disc storage architecture using nanoscale dual-beam lasers and aggregation-induced emission luminogens, achieving petabit-level (100+ terabytes) capacity on a standard 12-centimeter disc. By writing in hundreds of stacked volumetric layers, optical discs can reduce datacenter archival storage footprints and power consumption by orders of magnitude. backreaction.blogspot.com