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Measurement of orientation and susceptibility ratios using a polarization-resolved second-harmonic generation holographic microscope.


ABSTRACT: Three-dimensional second-harmonic fields, sample orientation, and susceptibility ratios of biological samples are measured using polarization-resolved second-harmonic generation (SHG) microscopy. The three-dimensional (3D) polarization is gathered by measurement of a series of holograms for which excitation and analyzer polarizations are systematically varied, and the 3D SHG field is recovered through numerical back propagation. Harmonophore orientation is resolved in 3D from a sub-set of polarization-resolved SHG holograms. We further expand on previous approaches for the determination of susceptibility ratios, adding the calculation of multiple ratio values to allow intrinsic verification.

SUBMITTER: Winters DG 

PROVIDER: S-EPMC3447544 | biostudies-other | 2012 Sep

REPOSITORIES: biostudies-other

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