Figure 1 (IMAGE)

Institute for Basic Science

Figure 1

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Graphic of the system: a two-dimensional superconductor close to its critical temperature. The system is exposed to electromagnetic field (orange arrow) with THz frequency. Stripes of metals as a grating (not shown) are required for the excitation of plasmons, a special type of excitations of unbound electrons in the superconductor. Thus, unbound electrons act as mediators: they interact with each other, with light (as plasmons), and with the Cooper pairs, depicted as dashed red circles.

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