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Nonlinear optical activity effects in complex anisotropic three-dimensional media

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Original languageEnglish
Pages (from-to)11-21
Number of pages11
JournalOptical Materials Express
Issue number1
Publication statusPublished - 2015
Publication typeA1 Journal article-refereed


We perform numerical modelling of nonlinear optical (NLO) microscopy of complex anisotropic three-dimensional (3D) media using the uncoupled dipole approximation. The modelling is applied to 3D biological microstructures resembling collagen fibers and multilamellar vesicles. The results elucidate how nonlinear optical activity effects, such as secondharmonic generation circular dichroism, can arise from 3D morphological chirality, in addition to molecular level chirality. We also show how thirdharmonic generation circular dichroism could act as a contrast mechanism for visualizing local structural ordering in 3D anisotropic materials.

Publication forum classification

Field of science, Statistics Finland