Pierre F. Brevet

TL;DR: In this article, the second-harmonic generation of 150 nm spherical gold nanoparticles is investigated both experimentally and theoretically, and the interference effects between dipolar and octupolar plasmons can be used as a fingerprint to discriminate the local surface and nonlocal bulk contributions to the second harmonic generation.

TL;DR: Polarization-resolved hyper Rayleigh scattering experiments were performed on gold metallic nanoparticles as mentioned in this paper, which unambiguously indicate that the second harmonic generation process of a nanoparticle is of pure electric dipole origin for the smallest particles as opposed to pure electric quadrupole, and that retardation effects come into play for larger sizes.

TL;DR: In this article, the extinction profiles as well as the hyper Rayleigh scattering signal of a highly monodisperse 22 nm diameter gold colloidal sol in the presence of pyridine have been measured.

TL;DR: In this paper, the second harmonic light collected from a liquid suspension of silver metallic particles, the diameter of which ranges from 20 nm up to 80 nm, was used to investigate hyper-rayleigh scattering, and it was inferred that retardation effects of the electromagnetic fields played a major role in the frequency conversion process.

TL;DR: Optical second-harmonic generation from gold nanoparticles is investigated both experimentally and theoretically and the contribution of octupoles is reported for the first time in the second- Harmonic emission pattern, by using an harmonic polarization in the scattering plane.