The shorter the antenna, the higher the frequency — so what happens when nanoantennas hit optical frequencies? One answer may lead to high-harmonic generation without the need for high-powered lasers.
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Landsman, A. The bright side of downsizing. Nature Phys 13, 626–628 (2017). https://doi.org/10.1038/nphys4131
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DOI: https://doi.org/10.1038/nphys4131