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Photoinduced two-dimensional gratings based on dye-doped cholesteric liquid crystal films
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10.1063/1.2798103
/content/aip/journal/jcp/127/14/10.1063/1.2798103
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/14/10.1063/1.2798103

Figures

Image of FIG. 1.
FIG. 1.

Chemical structures of CB15 and D2 used in this experiment.

Image of FIG. 2.
FIG. 2.

(a) A formed two-dimensional (2D) grating under a polarizing optical microscope (POM) without an analyzer based on dye-doped cholesteric liquid crystal (DDCLC) cell with (sample 6) for and . Grating spacing is under the POM. (b) Corresponding 2D diffraction pattern and (c) model of undulations of layers in the 2D grating, in which and represent the polarization direction of the linearly polarized green beam and the rubbing direction of the cell, respectively.

Image of FIG. 3.
FIG. 3.

Curves of the reflection spectrum of CLCs for sample 6 in dark (curve a) and under green beam illumination with , 440, and (curves b, c, and d, respectively) for .

Image of FIG. 4.
FIG. 4.

Curves of the reflection spectrum of CLCs for sample 6 at 25, 29, 32.5, and (curves a, b, c, and d, respectively) without green beam illumination.

Image of FIG. 5.
FIG. 5.

Lifetime variation of 2D grating with green beam intensity based on sample 6 (a) without and (b) with irradiation of a pumped red beam with an intensity of after the green beam is turned off.

Image of FIG. 6.
FIG. 6.

Spacing variation of 2D grating with green beam intensity in DDCLC cells with various helical pitches.

Tables

Generic image for table
Table I.

Six fabricated dye-depoed cholesteric liquid crystal (DDCLC) samples with different concentrations (wt %) of chiral dopant in the CLC mixture. The concentration of the dye dopant in the DDCLC mixture in each cell is .

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/content/aip/journal/jcp/127/14/10.1063/1.2798103
2007-10-12
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photoinduced two-dimensional gratings based on dye-doped cholesteric liquid crystal films
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/14/10.1063/1.2798103
10.1063/1.2798103
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