Optical data storage breakthrough increases capacity of diamonds by circumventing the diffraction limit

https://phys.org/news/2023-12-optical-storage-breakthrough-capacity-diamonds.html

"store many different images at same place in diamond using slightly different color laser to store different information into different atoms in same microscopic spots... control color centers' electrical charge precisely using narrow-band laser and cryogenic conditions, enabling writing and reading data at finer level down to single atom... circumvents diffraction limit exploiting slight color (wavelength) changes existing between color centers... writing data with sub-diffraction resolution... can infinitely write, erase, and rewrite "