A rewritable optical disc. First used in drives by Panasonic in the late 1980s, the phase change technology was subsequently employed in all major optical drives, including CD-RW, DVD-RW, DVD+RW, ...
Examples of structural phase changes abound in the natural world around us. But if we can exploit such changes on the nanoscale using light, new nanophotonics technology may be just around the corner.
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