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当前液晶显示已随处可见,然而,液晶的非显示应用同样有着巨大的市场潜力。曾在液晶的光通信器件研制方面有较长期的积累,近年来,进一步致力于将液晶应用于不同波段(可见-近红外-太赫兹)的光场调控。提出了一种利用液晶光控图案化取向实现光场产生、调制和变换的技术,研制了一套基于数字微镜阵列(DMD)的微区液晶光取向系统。基于此系统,制备了系列不同液晶模式、不同参数的液晶取向微结构,并对其衍射特性进行了研究,实现了对涡旋光、艾里光、矢量光等复杂光场的动态变换和调控。该工作可在新型光镊,轨道角动量复用光通信,甚至在量子信息处理中得到应用。
The current liquid crystal display has been ubiquitous, however, non-display applications of liquid crystal also have great market potential. In the field of liquid crystal optical communication devices, there has been a long-term accumulation. In recent years, further efforts have been devoted to the application of liquid crystals to light field control in different wavebands (visible-near-infrared-terahertz). A new technique of generating, modulating and transforming the light field is proposed based on the pattern orientation of liquid crystal light control. A micro-liquid crystal alignment system based on digital micromirror array (DMD) is developed. Based on this system, a series of liquid crystal alignment microstructures with different liquid crystal modes and different parameters were prepared and their diffraction properties were studied. The dynamic transformation and regulation of complex light fields such as vortex light, Airy light and vector light were realized. This work can be applied in new optical tweezers, orbital angular momentum multiplexing optical communications, and even in quantum information processing.