Transfer of energy between defects could underlie efficient, ultra-high-density optical memory storage

https://phys.org/news/2024-10-quantum-paves-efficient-ultra-high.html

"durable, fast, energy-efficient... narrow band emitters transfer optical data from rare earth embedded within solid material using slightly different wavelengths (multiplexing), to nearby quantum defect... overcomes light diffraction limit, boosting optical storage bit density... near-field energy transfer... quantum defects become excited from ground state/ flip spin state which is hard to reverse enabling long term storage... smaller wavelengths/ tiny defects enable denser data storage... future: how to read out the data"