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Three-dimensional imaging of director field orientations in liquid crystals by polarized four-wave mixing microscopy
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10.1063/1.3127535
/content/aip/journal/apl/94/17/10.1063/1.3127535
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/17/10.1063/1.3127535
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Experimental setup: SM, piezo beam-scanning mirror; QWP, quarter-wave plate; P, polarizer; OBJ, microscope objective; S, sample; F, short-wave pass filter; and PMT, photomultiplier tube. (b) Spectra of the shaped laser pulse and the FWM signal from 5CB. Note that intensities of the laser and the FWM signal are in different scales.

Image of FIG. 2.
FIG. 2.

Experimental FWM signal intensity vs the angle between the directions of the laser polarization and the chain orientation of an aligned 5CB film (molecular structure shown in the inset). The solid curve is the fit of to the experimental data. Note that the polarization contrast is better than ten.

Image of FIG. 3.
FIG. 3.

(a) 3D pattern of director fields, of a FCD in a smectic A LC. (Inset: the molecular structure of 8CB). Note that only the lower half of the FCD domain is shown. [(b)–(d)] Horizontally sectioned FWM images of FCDs in an 8CB film. The laser polarization direction is along and axes in [(b) and (c)], respectively. Circularly polarized laser pulses are used in (d). (e) Vertical cross section along the black line in (c). White arrows represent the laser polarization directions in [(b)–(e)]. All the image sizes are .

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/content/aip/journal/apl/94/17/10.1063/1.3127535
2009-04-30
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Three-dimensional imaging of director field orientations in liquid crystals by polarized four-wave mixing microscopy
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/17/10.1063/1.3127535
10.1063/1.3127535
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