Researchers realized a magnet that can optically switch the polarization plane of light by 90 degrees. Nature Photonics asked Shin-ichi Ohkoshi how his group achieved this feat.
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Horiuchi, N. Optical switching of magnetism. Nature Photon 8, 80 (2014). https://doi.org/10.1038/nphoton.2013.357
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DOI: https://doi.org/10.1038/nphoton.2013.357