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Sci Rep. 2016 May 03;6:25415. doi: 10.1038/srep25415.

Multi-Order Investigation of the Nonlinear Susceptibility Tensors of Individual Nanoparticles.

Scientific reports

Cédric Schmidt, Jérémy Riporto, Aline Uldry, Andrii Rogov, Yannick Mugnier, Ronan Le Dantec, Jean-Pierre Wolf, Luigi Bonacina

Affiliations

  1. Université de Genève, GAP-Biophotonics, 22 chemin de Pinchat, Carouge, 1211 Geneva 4, Switzerland.
  2. Univ. Savoie Mont Blanc, SYMME, F-74000 Annecy, France.

PMID: 27140074 PMCID: PMC4853726 DOI: 10.1038/srep25415

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.

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