By using light to assist the recording process, hard disk drive capacity could potentially be increased by two orders of magnitude. The idea is to heat the magnetic medium locally, thus temporarily lowering its resistance to magnetic polarization.
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Pan, L., Bogy, D. Heat-assisted magnetic recording. Nature Photon 3, 189–190 (2009). https://doi.org/10.1038/nphoton.2009.40
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DOI: https://doi.org/10.1038/nphoton.2009.40
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