In this talk, we present our study of a nonlinear optical effect distinct from current theory foresees . To prove our claim, we have measured the SHG from arrays of gold-silver heterodimers and silver and gold homodimers such as the one shown in Fig 1(a). Our sample's unique feature is its size, which is smaller than the electromagnetic penetration depth in the respective metals - see the scale bar for comparison. The interaction, therefore, is highly dipolar, and thus nonexistent SHG should emerge. Non the less, What Fig 1(b) shows is that the Au-Ag nanoantenna produces substantial SHG while the Au-Au and Ag-Ag are negligible, as expected. Full-wave simulation of our samples, as shown in Fig. 1(c) , takes into account all known plasmonic confinement and enhancement effect, such as localized plasmons  , multimode interactions  ,  , hybridization  ,  , gap plasmons  , cascaded plasmons  , multipolar effects  , and silencing . The simulation predicts little to none SHG for all material combinations in this case, with the topmost SHG from the Ag-Ag structure and without the experimental spectral peak. It is clear, therefore, that our results are beyond the conventional theory embedded in the simulation.