Abstract
The symmetry of molecular angular distributions obtained by All-Optical Poling (AOP) has been widely studied, but not the equilibrium between the different tensorial orders. Particularly the photoinduced anisotropy (quadrupolar contribution) is in competition with the non-centrosymmetric contributions (dipolar and octupolar) responsible for the generation of χ(2). For that reason, we developed theoretical and experimental tools for studying the dynamics of the 3D orientational order, by measuring simultaneously the SHG and the trichroism at several wavelengths. We also introduced a third excitation beam, to obtain a 3D pumping.
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Nguyen Thi Kim, N., Dumont, M. (2003). 3D Characterization of Molecular Photo-Orientation: Application to All-Optical Poling. In: Charra, F., Agranovich, V.M., Kajzar, F. (eds) Organic Nanophotonics. NATO Science Series, vol 100. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0103-8_33
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DOI: https://doi.org/10.1007/978-94-010-0103-8_33
Publisher Name: Springer, Dordrecht
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