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- W1977580454 abstract "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." @default.
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- W1977580454 date "2001-10-01" @default.
- W1977580454 modified "2023-09-27" @default.
- W1977580454 title "Circular-difference effects in second-harmonic generation from thin films" @default.
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- W1977580454 doi "https://doi.org/10.1016/s0379-6779(01)00441-6" @default.
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