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Magnetic Storage at Light Speed

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Circularly polarized laser beams can increase the speed of switching bit states in magnetic media.

Hank Hogan

Researchers at Radboud University Nijmegen in the Netherlands and at Nihon University in Funabashi, Japan, have shown that the future of magnetic storage may involve light. The group demonstrated all-optical magnetic recording, switching the magnetization polarity without using a magnetic field. Instead, they employed a circularly polarized laser pulse, opening the way for faster recording speeds and speedier disk drives than otherwise would be possible. Researchers have demonstrated all-optical recording of magnetic bits by scanning a circularly polarized laser beam across a sample. Local...Read full article

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    Published: September 2007
    Glossary
    light
    Electromagnetic radiation detectable by the eye, ranging in wavelength from about 400 to 750 nm. In photonic applications light can be considered to cover the nonvisible portion of the spectrum which includes the ultraviolet and the infrared.
    lightmagnetic fieldMicroscopyRadboud University NijmegenResearch & Technology

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