New optical storage breakthrough could make CDs relevant again

Researchers propose 'ultra-high-density' optical discs using rare-earth quantum defects.

: A breakthrough in optical storage by the University of Chicago and Argonne National Lab introduces 'ultra-high-density' media using rare-earth quantum defects. Their method involves using wavelength multiplexing with rare-earth emitters to bypass the diffraction limit of light. While promising, further research is needed to determine the durability and capacity of this technology. Commercial applicability is still years away, but the potential is significant.

Researchers from the University of Chicago and Argonne National Lab have introduced a novel optical storage method that may revitalize CDs. This technology leverages rare-earth atoms and quantum defects in a solid material to potentially significantly boost data density, overcoming the diffraction limits tied to current optical media formats.

The method, described as wavelength multiplexing, exploits multiple wavelengths emitted from rare-earth atoms within a host material like magnesium oxide crystals. This innovation enables the manipulation of light at a much smaller scale, potentially packing more data into an existing space.

Despite its groundbreaking potential, several questions remain unanswered, such as the longevity of the excited states in the quantum defects. Although scientists are enthusiastic, estimating capacity and achieving commercial viability will require extensive additional investigation.

Quantum StorageOptical MemoryElectronics