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Laser-induced reorientation effect and ripple structure in dye-doped liquid-crystal films

机译:染料掺杂液晶薄膜的激光诱导取向效应和波纹结构

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The effects of light-induced reorientation on a homeotropical dye-doped liquid crystal (DDLC) cell are discussed. The photoexcited azo dye Methyl Red (MR) is diffused and adsorbed onto the substrate, thus forming a ripple structure. The adsorbed dye and the laser-induced ripple structure then reorient the liquid-crystal molecules and induce a holographic grating. Initially, the liquid-crystal directors are reoriented primarily by the adsorbed dye. However, given a sufficiently large ripple groove amplitude, the torque imposed by the ripple grooves overcomes that which is due to the adsorbed dyes, and the liquid crystals are realigned along the groove direction. (C) 2003 Optical Society of America. [References: 14]
机译:讨论了光诱导的取向对垂直染料掺杂的液晶(DDLC)单元的影响。光激发的偶氮染料甲基红(MR)扩散并吸附到基板上,从而形成波纹结构。然后,吸附的染料和激光诱导的波纹结构重新定向液晶分子并诱导出全息光栅。最初,液晶指向矢主要通过吸附的染料重新取向。然而,在给定足够大的波纹槽振幅的情况下,由波纹槽施加的转矩克服了由于吸附的染料引起的转矩,并且液晶沿着槽方向重新排列。 (C)2003年美国眼镜学会。 [参考:14]

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