用于光开关微通道的双折射氧化石墨烯液晶
Birefringent Graphene Oxide Liquid Crystals in Micro-channels for Optical Switch
摘要：
我们提出了一个机械-流体动力学实验装置，其中微流体运动操纵悬浮的氧化石墨烯液晶的光学双折射。通过在微通道中流动氧化石墨烯液晶来改变样品的双折射。通过测量五种流速下的寻常折射率和非常折射率，可以精确地确定样品的双折射值。我们的研究结果表明，通过调节分散的氧化石墨烯纳米薄片的浓度和流速，可以控制诱导的双折射。它还表明，这种方法可以用作光开关。
英文摘要：
We propose a mechanical-hydrodynamical experimental setup in which the microfluidic motion manipulates the optical birefringence of levitated graphene oxide liquid crystal. The birefringence of the sample is changed by flowing graphene oxide liquid crystal in the micro-channel. By measuring the ordinary and extraordinary refractive indices at five flow rates, one can determine the value of the birefringence of the samples, precisely. Our results demonstrate that, by adjusting the concentration and flow rate of dispersion of the graphene oxide nano flakes, the induced birefringence can be controlled. It is also shown that this approach can be used as an optical switch.
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