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Title: Circular-difference effects in second-harmonic generation from thin films
Authors: Sioncke, Cornelia ×
Van Elshocht, Sven
Verbiest, Thierry
Kauranen, M
Phillips, KES
Katz, TJ
Persoons, Andre #
Issue Date: Jan-2001
Publisher: Elsevier science sa
Series Title: Synthetic metals vol:124 issue:1 pages:191-193
Abstract: Chiral molecules have received much attention in nonlinear optics because they are inherently noncentrosymmetric. It has been shown that second-harmonic generation (SHG) from chiral, isotropic surfaces and thin films is sensitive to the handedness of circularly-polarized fundamental light. These circular-difference (CD)-effects in SHG are used to probe the chirality of a sample. However, an achiral, anisotropic surface can also give rise to CD-effects in SHG. This can be explained by the fact that for some orientations of the sample, the total geometry becomes chiral. We investigated a chiral, anisotropic Langmuir-Blodgett film. For such a sample both chirality and anisotropy give rise to CD-effects in SHG. Our goal was to extract the optical activity effects due to chirality. Our technique is based on the fact that CD-effects originating from anisotropy will critically depend on the azimuthal rotation angle of the sample in the set-up whereas the CD-effects coming from chirality will remain constant. (C) 2001 Elsevier Science B.V. All rights reserved.
ISSN: 0379-6779
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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