Better clear a shelf in your basement for that high-end Blu-ray DVD player you just bought. Researchers report that they can boost the amount of data stored on a disc 10,000-fold by using gold nanoparticles. If commercialized, the technology could allow a single disc to hold as many as 300 movies or 250,000 songs.
Today's CDs and DVDs store data as a string of pits burned into a narrow spiral track in plastic discs. Although less of a commercial success, holograms boost data-storage capacities by storing data in three dimensions. In an effort to kick things up a notch, researchers led by Min Gu, an optoelectronics expert at Swinburne University of Technology in Hawthorn, Australia, added two additional dimensions: the color of light used to write and read the data and the light's polarization, or the direction of its electric field.
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