Second-Order Nonlinear Optical Properties of Plasmonic Nanostructures

摘要: We review our work on second-order nonlinear optical properties of plasmonic nanostructures. In order to achieve the required non-centrosymmetry structures, samples consist arrays L-shaped nanoparticles and T-shaped nanodimers. The are investigated by polarization-dependent second-harmonic generation address tensorial response. show that response can be strongly modified symmetry-breaking defects other deviations from ideal. Nonlinear sources localized also give rise higher-multipolar emission. defect problem is overcome with a recent significant improvement in sample quality, allowing dipole limit reached. This achievement opens path towards metamaterials tailorable properties. As demonstration this possibility, we modify mutual arrangement particles array. will summarize numerical boundary-element method describe nanoparticles.