Researchers from the University of South Hampton in the UK have developed a quick and energy-efficient laser-writing method for making high-density nanostructures in silica glass. More specifically, these small structures can be utilized for long-term five-dimensional (5D) optical data storage that is over 10,000 times more dense than Blu-ray optical media.
This new method for writing data basically consists of two optical dimensions, along with three spatial dimensions, enabling it to write at speeds of 1,000,000 voxels per second, or the equivalent to recording about 230 kilobytes of data (100+ pages of text) per second. It’s so efficient that the researchers managed to write 5GB of text data onto a silica glass disc about the size of a conventional compact disc with nearly 100% readout accuracy. Thanks to the writing density available with this method, the disc would theoretically be able to hold 500 terabytes of data.
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Individuals and organizations are generating ever-larger datasets, creating the desperate need for more efficient forms of data storage with a high capacity, low energy consumption and long lifetime. While cloud-based systems are designed more for temporary data, we believe that 5D data storage in glass could be useful for longer-term data storage for national archives, museums, libraries or private organizations,” said Yuhao Lei, doctoral researcher from the University of Southampton in the UK.
