Waveguides are crucial for directing light, but truly useful waveguides should confine light on the nanoscale. Researchers show that a semiconducting nanowire close to a metallic surface can confine light far below the diffraction limit and guide it over dozens of wavelengths.
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Maier, S. The best of both worlds. Nature Photon 2, 460–461 (2008). https://doi.org/10.1038/nphoton.2008.144
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DOI: https://doi.org/10.1038/nphoton.2008.144
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