By James Sherwood 27th April 2009
General Electric (GE) has demonstrated a storage technology with the potential for allowing 500GB of data to be written onto a single DVD-sized disc. GE hailed its technology – known as micro-holographic storage – as a “next generation optical storage” technology. It added that the technology could see individual discs able to hold the same amount of data as 20 single-layer Blu-ray Discs. Data is only written to the read surface of DVDs and BDs, but holographic storage uses the disc’s entire volume by creating 3D patterns that represent bits of information. GE hasn’t actually created a 500GB micro-holographic disc yet. The firm’s boffins recorded micro-holographic marks with nearly one per cent reflectivity and a diameter of roughly one micron – one millionth of a metre — in order to demonstrate the basic technology. Based on this achievement, GE’s boffins are confident that its scaled down marks would have sufficient reflectivity to enable 500GB to be written onto a disc.
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