Long-term data storage based defects created by focused ion beam in silicon carbide

https://phys.org/news/2024-04-team-path-term-storage-based.html

"proton or helium ion beam providing high spatial resolution, fast writing speed, low energy for storing single bit, read using lphotoluminescence using focused electron-beam excitation causing cathodoluminescence... storage density diffraction limit inherent to optical media overcome by encoding 3D plus 4th intensity dimension, controlling lateral position, depth, number of defects... retention time > a few generations under ambient conditions... areal storage density corresponds to Blu-ray disks"