title: Multi-Order Investigation of the Nonlinear Susceptibility Tensors of Individual Nanoparticles.
abstract: We use Hyper Rayleigh Scattering and polarization resolved multiphoton microscopy to investigate simultaneously the second and third-order nonlinear response of Potassium Niobate and Bismuth Ferrite harmonic nanoparticles. We first derive the second-to-third harmonic intensity ratio for colloidal ensembles and estimate the average third-order efficiency of these two materials. Successively, we explore the orientation dependent tensorial response of individual nanoparticles fixed on a substrate. The multi-order polarization resolved emission curves are globally fitted with an analytical model to retrieve individual elements of susceptibility tensors.
authors.affiliation: Université de Genève, GAP-Biophotonics, 22 chemin de Pinchat, Carouge, 1211 Geneva 4, Switzerland.
authors.forename: Cédric
authors.initials: C
authors.lastname: Schmidt
authors.affiliation: Univ. Savoie Mont Blanc, SYMME, F-74000 Annecy, France.
authors.forename: Jérémy
authors.initials: J
authors.lastname: Riporto
authors.affiliation: Université de Genève, GAP-Biophotonics, 22 chemin de Pinchat, Carouge, 1211 Geneva 4, Switzerland.
authors.forename: Aline
authors.initials: A
authors.lastname: Uldry
authors.affiliation: Université de Genève, GAP-Biophotonics, 22 chemin de Pinchat, Carouge, 1211 Geneva 4, Switzerland.
authors.forename: Andrii
authors.initials: A
authors.lastname: Rogov
authors.affiliation: Univ. Savoie Mont Blanc, SYMME, F-74000 Annecy, France.
authors.forename: Yannick
authors.initials: Y
authors.lastname: Mugnier
authors.affiliation: Univ. Savoie Mont Blanc, SYMME, F-74000 Annecy, France.
authors.forename: Ronan Le
authors.initials: RL
authors.lastname: Dantec
authors.affiliation: Université de Genève, GAP-Biophotonics, 22 chemin de Pinchat, Carouge, 1211 Geneva 4, Switzerland.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Wolf
authors.affiliation: Université de Genève, GAP-Biophotonics, 22 chemin de Pinchat, Carouge, 1211 Geneva 4, Switzerland.
authors.forename: Luigi
authors.initials: L
authors.lastname: Bonacina