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首页> 外文期刊>The Journal of Chemical Physics >Photoinduced two-dimensional gratings based on dye-doped cholesteric liquid crystal films
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Photoinduced two-dimensional gratings based on dye-doped cholesteric liquid crystal films

机译：基于染料掺杂的胆甾型液晶薄膜的光致二维光栅

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摘要

This work elucidates photoinduced two-dimensional (2D) gratings in dye-doped cholesteric liquid crystal films. The helical pitch is increased by green-beam-induced trans-cis isomerization and a concomitant thermal effect. Two-dimensional gratings appear when the green beam is turned off. Grating formation results from elastic instability caused by restored strain arising from helical pitch reduction. Grating lifetime increases as green beam intensity increases and declines under irradiation with a strong red beam. Variation in grating spacing with green intensity with various pitches is also examined.
机译：这项工作阐明了染料掺杂的胆甾型液晶薄膜中的光致二维（2D）光栅。绿束诱导的反式-顺式异构化和伴随的热效应增加了螺距。绿光束关闭时会出现二维光栅。光栅的形成是由于由螺距减小引起的恢复的应变所引起的弹性不稳定性。光栅寿命随着绿光强度的增加和在强红光照射下的下降而增加。还检查了具有不同间距的绿色强度的光栅间距的变化。

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