Gao Yao, Luo Yuxiang, Lu Jiangang
National Engineering Lab for TFT-LCD Materials and Technologies, Department of Electronic, Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Molecules. 2021 Nov 15;26(22):6889. doi: 10.3390/molecules26226889.
Cholesteric liquid crystals (CLCs) have been widely applied in optical filters due to Bragg reflection caused by their helical structure. However, the reflectivity of CLC filters is relatively low, commonly less than 50%, as the filters can only reflect light polarized circularly either left- or right-handedly. Therefore, a high-reflective CLC filter with a single-layer template was proposed which may reflect both right- and left-handed polarized light. The CLC filters of the red, green, blue color were fabricated by the templating technology, which show good wavelength consistency. Additionally, a multi-phase liquid crystal filter with high reflectance was demonstrated by the single-layer templating technology. The templated CLC or multi-phase liquid crystal filters show great potential applications in the optical community, reflective display, and lasing.
胆甾相液晶（CLC）因其螺旋结构引起的布拉格反射而被广泛应用于光学滤波器。然而，CLC滤波器的反射率相对较低，通常小于50%，因为该滤波器只能反射左旋或右旋圆偏振光。因此，有人提出了一种具有单层模板的高反射CLC滤波器，它可以反射左旋和右旋偏振光。通过模板技术制备了红色、绿色、蓝色的CLC滤波器，这些滤波器具有良好的波长一致性。此外，通过单层模板技术展示了一种高反射率的多相液晶滤波器。模板化的CLC或多相液晶滤波器在光学领域、反射式显示和激光领域显示出巨大的潜在应用价值。
