Title: High-frequency demodulation of multi-photon fluorescence in hyper-Rayleigh scattering
Authors: Olbrechts, Geert ×
Strobbe, R
Clays, Koen
Persoons, Andre #
Issue Date: Jan-1998
Publisher: Amer inst physics
Series Title: Review of scientific instruments vol:69 issue:6 pages:2233-2241
Abstract: A novel technique for suppression of the multi-photon fluorescence contribution in second-order nonlinear optical hyper-Rayleigh scattering experiments is described. The technique takes advantages of the demodulation and the phase shift in the frequency domain of the time-delayed (multi-photon) fluorescence in the time domain. We demonstrate the effectiveness of demodulation at high modulation frequencies of the fundamental laser beam by determining the molecular second-order nonlinear polarizability for a reference molecule under fluorescent conditions. The value that was obtained for crystal-violet in methanol with 9,10-diphenylanthracene added as a centrosymmetric fluorophore compares very well with the values that were previously obtained. The possibility of complete suppression of all fluorescence, based on phase-sensitive measurements in quadrature with the fluorescence, is also discussed. (C) 1998 American Institute of Physics. [S0034-6748(98)04705-4].
ISSN: 0034-6748
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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