1. Characterization of the nonlinear optical properties of nanocrystals by Hyper Rayleigh Scattering
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Luigi Bonacina, Cécile Joulaud, Marc Dubled, Christine Galez, Gnon Djanta, Ronan Le Dantec, Jean-Christophe Marty, Jean-Pierre Wolf, Yannick Mugnier, Symme, Univ. Savoie Mont Blanc, Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Group of Applied Physics [Geneva] (GAP), and University of Geneva [Switzerland]
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Niobium ,Biomedical Engineering ,[PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph] ,Nanoparticle ,Medicine (miscellaneous) ,Pharmaceutical Science ,Nanotechnology ,Bioengineering ,02 engineering and technology ,ddc:500.2 ,010402 general chemistry ,01 natural sciences ,Applied Microbiology and Biotechnology ,Nanomaterials ,symbols.namesake ,Dynamic light scattering ,Tutorial ,Scattering, Radiation ,Rayleigh scattering ,Particle Size ,[SPI.MECA.GEME] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanical engineering [physics.class-ph] ,Physics ,business.industry ,Scattering ,[PHYS.MECA.GEME] Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph] ,Second-harmonic generation ,Oxides ,Acoustics ,021001 nanoscience & nanotechnology ,[SPI.MECA.GEME]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanical engineering [physics.class-ph] ,0104 chemical sciences ,Nanocrystal ,Nonlinear Dynamics ,symbols ,Optoelectronics ,Nanoparticles ,Molecular Medicine ,Particle size ,Zinc Oxide ,0210 nano-technology ,business - Abstract
International audience; Background: Harmonic Nanoparticles are a new family of exogenous markers for multiphoton imaging exerting optical contrast by second harmonic (SH) generation. In this tutorial, we present the application of Hyper-Rayleigh Scattering (HRS) for a quantitative assessment of the nonlinear optical properties of these particles and discuss the underlying theory and some crucial experimental aspects. Methods: The second harmonic properties of BaTiO3, KNbO3, KiTiOPO4 (KTP), LiNbO3 and ZnO nanocrystals (NCs) are investigated by HRS measurements after careful preparation and characterization of colloidal suspensions. Results: A detailed analysis of the experimental results is presented with emphasis on the theoretical background and on the influence of some experimental parameters including the accurate determination of the nanocrystal size and concentration. The SH generation efficiency and averaged nonlinear optical coefficients are then derived and compared for six different types of NCs. Conclusions: After preparation of colloidal NC suspensions and careful examination of their size, concentration and possible aggregation state, HRS appears as a valuable tool to quantitatively assess the SH efficiency ofnoncentrosymmetric NCs. All the investigated nanomaterials show high SH conversion efficiencies, demonstrating a good potential for bio-labelling applications.
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