The promising field of terahertz imaging has long been limited by poor resolution. Researchers now believe that the intriguing properties of surface-plasmon polaritons on corrugated wires could help beat the diffraction limit and inspire a new generation of terahertz photonic devices.
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Johnston, M. Superfocusing of terahertz waves. Nature Photon 1, 14–15 (2007). https://doi.org/10.1038/nphoton.2006.60
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DOI: https://doi.org/10.1038/nphoton.2006.60
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