Size dependence of rotation frequency of individual laser trapped liquid crystal droplets
Size dependence of rotation frequency of individual laser trapped liquid crystal droplets
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DOI：
10.1143/jjap.38.l518
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发表时间：
1999-05-01
期刊：
影响因子：
--
通讯作者：
Misawa, H
中科院分区：
文献类型：
--
作者：
Juodkazis, S;Shikata, M;Misawa, H
我们报告了通过激光操纵三维捕获的微米尺寸向列液晶滴实现的全光学液晶（LC）开关的开发。对于微米尺寸的 LC 液滴，偏振器/LC 液滴/分析仪系统的传输可以高达 10(3) Hz 的频率进行调制。光学切换对应于 LC 液滴旋转 pi/4 角度。旋转频率对液晶液滴尺寸的依赖性可以通过液晶液滴分子的圆偏振光散射来解释。这种散射导致角动量从光转移到液晶液滴。
We report the development of an all-optical liquid-crystal (LC) switch realized by laser manipulation of a three-dimensionally trapped micrometer-size nematic liquid-crystal droplet. Transmission of a polarizer/LC droplet/analyzer system can be modulated at a frequency as high as 10(3) Hz for micrometer sized LC droplets. An optical switching corresponds to the rotation of the LC droplet by an angle of pi/4. The dependence of rotation frequency on LC droplet size is explained in terms of the circularly polarized light scattering by the molecules of the LC droplet. This scattering is responsible for the transfer of angular momentum from the light to the LC droplet.