Figure 2

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Second harmonic far-field radiation pattern in XY (blue) and XZ (red) planes, calculated for a nanosphere with radius (a) r = 70 nm, (b) r = 90 nm, and (c) r = 110 nm; each polar plot is normalized to the maximum forward (XZ) scattering. Below each polar plot, we show forward to backward (F/B) ratio, followed by the near-field distribution of electric field intensity at 400 nm, plotted in the xz-plane. Inset shows planes of the scattering geometry, the spectrum response result from a time monitor, and the electric field intensity color scale (equal for all nanospheres).

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