Optimizing the Nematic Liquid Crystal Relaxation Speed by Magnetic Field
Optimizing the Nematic Liquid Crystal Relaxation Speed by Magnetic Field
复制标题
通过磁场优化向列液晶弛豫速度
DOI：
10.1063/1.1767289
复制
发表时间：
2004
影响因子：
3.2
通讯作者：
P. Bos
中科院分区：
文献类型：
--
作者：
Bin Wang;Xinghua Wang;P. Bos
向列型液晶材料已广泛应用于可见光的电光控制。然而，当考虑IR光时，必须增加液晶层的厚度，这导致材料的弛豫时间比许多应用所需的要慢。在本文中，我们使用一个磁场来提高厚磁致伸缩器件的速度。我们表明，以上一个特定的磁场强度，较厚的细胞比薄的更快地放松。此外，我们发现，存在一个最佳的电压范围为一个特定的厚度，并与一个特定的施加磁场的设备。使用2T磁场，可以在不到5ms的时间内实现1.55μm光的半波调制。
Nematic liquid crystalline materials have been widely used in electro-optical control of visible light. However, when IR light is considered, the thickness of the liquid crystal layer must be increased which causes the relaxation time of the material to be slower than required for many applications. In this paper we use a magnetic field to increase the speed of thick nematic devices. We show that above a particular magnetic field strength, thicker cells relax more quickly than thinner ones. Also, we find that there exists an optimal voltage range for devices of a particular thickness and with a particular applied magnetic field. Devices that allow a half-wave modulation of 1.55μm light in less than 5ms are shown to be possible with the use of a 2T magnetic field.