Title: Hyper-Rayleigh scattering in the Fourier domain for higher precision: Correcting for multiphoton fluorescence with demodulation and phase data
Authors: Wostyn, Kurt
Binnemans, Koen
Clays, Koen ×
Persoons, Andre #
Issue Date: 2001
Publisher: Amer inst physics
Series Title: Review of scientific instruments vol:72 issue:8 pages:3215-3220
Abstract: An improved experimental technique for the suppression of the multiphoton fluorescence contribution in hyper-Rayleigh scattering experiments for the determination of the first hyperpolarizability of molecules in solution is presented. This improvement allows for a better correction for the fluorescence artifact, so as to eliminate any overestimation for the value of the first hyperpolarizability. The measurement of the demodulation only of the fluorescence as a function of modulation frequency [Olbrechts , Rev. Sci. Instrum. 69, 2233 (1998)] is now complemented by the measurement of the phase lag between the intermediate scattering and the time-delayed fluorescence. From the simultaneous data reduction of demodulation and phase shift toward the hyperpolarizability, fluorescence contribution, and fluorescence lifetime, an improvement in precision of 1 order of magnitude is demonstrated. This level of precision has been used to show the relative impact of f-orbital filling and ligands on the molecular second-order nonlinear optical response of lanthanide complexes containing a hemicyanine chromophore.
ISSN: 0034-6748
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Molecular Design and Synthesis
× corresponding author
# (joint) last author

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