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Terahertz technology

Mind the gap

Researchers in South Korea and the Netherlands have demonstrated that the enhancement of the electric field of terahertz radiation inside a nano-slit continues to grow, even when the slit becomes narrower than the skin depth of the material.

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Figure 1: Computed electric field amplitude, E, and current, J, for a 70-nm-wide slit in a 60-nm-thick gold film.


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Martin-Moreno, L. Mind the gap. Nature Photon 3, 131–132 (2009).

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