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首页> 外文期刊>Crystallography reports >Hysteresis of Freedericksz transition in confined light beams
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Hysteresis of Freedericksz transition in confined light beams

机译:受限光束中Freedericksz跃迁的磁滞

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摘要

The effect of the transverse confinement of an incident light beam on the hysteresis of light-induced Freedericksz transition in a nematic liquid crystal cell is considered. The thresholds of the orientational instability of the director with an increase and decrease in the light beam's intensity are calculated numerically in relation to its transverse size. The hysteresis loop width is shown to change nonmonotonically with an increase in the transverse dimension. In contrast to a homogeneous light beam, the hysteresis existence region is determined not only by the parameter (K (3) - K (1))/K (3) but also by the parameter K (2)/K (3). With an increase in the transverse beam size, the critical values of the parameter (K (3) - K (1))/K (3) increase, while those of the parameter K (2)/K (3) decrease.
机译:考虑了向列液晶盒中入射光束的横向限制对光诱导的Freedericksz跃迁的滞后的影响。随着光束强度的增加和减少,指向矢的定向不稳定性的阈值将根据其横向尺寸进行数值计算。磁滞回线宽度显示为随着横向尺寸的增加而非单调变化。与均匀光束相反,滞后存在区域不仅由参数(K(3)-K(1))/ K(3)确定,而且由参数K(2)/ K(3)确定。随着横梁尺寸的增加,参数(K(3)-K(1))/ K(3)的临界值增大,而参数K(2)/ K(3)的临界值减小。

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