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Schematic drawing of the hot spot between two silver nanospheres. As the hot spot (shaded area) is small, its local field is almost identical to the one computed by replacing the sphere with a plate. is the incident laser field.
Time evolutions of the potential difference between the silver plates for different separations , 0.4, 0.5, 0.6, and 1 nm. ; ; . Dashed lines are for the averaged .
as a function of the separation . ; . ; . The inset shows the decay rate of .
Time evolutions of the potential difference between the silver plates for different enhanced local electric fields . ; . The inset shows as a function of the local electric field . ; .
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