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Chin. Opt. Lett.
 Home  List of Issues    Issue 04 , Vol. 16 , 2018    10.3788/COL201816.041902

Nonlinear optical characterization of single β-barium-borate nanocrystals using second-harmonic confocal microscopy
Rodrigo G. dos Santos1, Lauro J. Q. Maia2, Cid B. de Araújo1, and Leonardo de S. Menezes1
1 Departamento de Física, [Universidade Federal de Pernambuco], Recife-PE 50670-901 , Brazil
2 Instituto de Física, [Universidade Federal de Goiás], Goiania-GO 74001-970, Brazil

Chin. Opt. Lett., 2018, 16(04): pp.041902

Topic:Nonlinear optics
Keywords(OCIS Code): 190.3970  180.4315  190.2620  

The confocal microscopy technique was applied for nonlinear optical characterization of single β-barium-borate (β-BBO) nanocrystals. The experimental setup allows measurements of the laser polarization-selective second-harmonic (SH) generation, and the results can be used to determine the nanocrystals’ c-axis orientation, as well as to obtain information about their second-order susceptibility χ(2). The dependence of the SH signal on the laser polarization allowed the discrimination of individual particles from aggregates. The data were fitted using a model that takes into account the BBO properties and the experimental setup characteristics considering (i) the electrostatic approximation, (ii) the effects of the microscope objective used to focus the light on the sample in an epi-geometry configuration, and (iii) the symmetry of χ(2) for the β-BBO nanocrystals. A signal at the third-harmonic frequency was also detected, but it was too weak to be studied in detail.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Posted online:2018/3/26

Get Citation: Rodrigo G. dos Santos, Lauro J. Q. Maia, Cid B. de Araújo, and Leonardo de S. Menezes, "Nonlinear optical characterization of single β-barium-borate nanocrystals using second-harmonic confocal microscopy," Chin. Opt. Lett. 16(04), 041902(2018)

Note: The authors acknowledge support from the Instituto Nacional de Fot?nica-INFo, Conselho Nacional de Desenvolvimento Científico e Tecnológico-CNPq, Coordena??o de Aperfei?oamento de Pessoal de Nível Superior-CAPES, Funda??o de Amparo à Ciência e Tecnologia do Estado de Pernambuco-FACEPE, and Funda??o de Amparo à Pesquisa do Estado de Goiás -FAPEG.


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