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Light-controllable linear dichroism in nematics

机译:向列相中的光控线性二向色性

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We report a method to obtain a light-controllable dichroism. The main effect is achieved using spiropyran-doped (SP-doped) nematic liquid crystal mixtures. SP molecules exhibit a high solubility in the liquid crystal host, which can vary between 1% and 4% in weight, without destroying the liquid crystalline phase. Due to their elongated shape, SP molecules are oriented along the nematic liquid crystal director. The obtained linear dichroism was measured to be 1.08 with a dichroic ratio of 7.12. Further, a two-direction linear dichroism was obtained by adding a dichroic dye to the mixture. The angle between the two dichroic axes was found to be 11 degrees. Two-direction linear dichroism is also light controllable and can be switched back to one-direction dichroism. (C) 2015 Optical Society of America
机译:我们报告了一种获得光控二色性的方法。使用螺吡喃掺杂(SP掺杂)的向列液晶混合物可达到主要效果。 SP分子在液晶主体中显示出高溶解度,其重量可在1%至4%之间变化,而不会破坏液晶相。由于其细长的形状,SP分子沿向列型液晶指向矢取向。测得的线性二色性为1.08,二色性比为7.12。此外,通过向该混合物中添加二色性染料获得了双向线性二色性。发现两个二向色轴之间的角度为11度。双向线性二向色性也是光可控的,并且可以切换回单向二向色性。 (C)2015年美国眼镜学会

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