基于稳定光取向层的铁电液晶器件及应用研究

Ferroelectric liquid crystal devices due to their fast response have become one of the most important ways to realize spatial light modulators. Current researches focus on the rewritability of Azo dye photo-alignment layer to make liquid crystal devices. The efforts on Ferroelectric liquid crystals with stable Azo dye photo-alignment layer are still in the initial stage because of the instability of photo-alignment layer and the unknown interacted effects of polymers and ferroelectric liquid crystals. Based on the requirements of fast light modulators, this project aims to reveal the influence of polymer stabilized photo-alignment layers on two different working modes ferroelectric liquid crystals, optimize characteristics of stabilized photo-alignment layers and experiment procedures, and explore feasible methods of making stable ferroelectric liquid crystal folk grating and Q-plate and their applications on fast light modulation. To achieve these, the following studies will be carried out: (1) reveal the influence of optically stabilized photo-alignment layer and thermally stabilized photo-alignment layer on optical and physical properties of ferroelectric liquid crystals such as response time, contrast ratio, electro-optic effect, etc. (2) acheive optimal production methods of making ferroelectric liquid crystal cells based on stable photo-alignment layer. (3) explore methods of fabricating simple and complex structure gratings using stable photo-aligned ferroelectric liquid crystal cells. Eventually fabricate stable photo-aligned ferroelectric liquid crystal fork grating and Q-plate demos. The obtained results will provide a new theoretical support and effective implementation for the development of stabilized photo-aligned ferroelectric liquid crystal light modulation devices with fast response.

铁电液晶器件因其快速响应的特点而成为实现光场快速调控的重要手段之一。目前的研究主要集中在利用偶氮染料光取向层的可多次擦写性能制作液晶光学器件，对稳定的偶氮染料光取向层以及基于稳定的偶氮染料光取向层铁电液晶的研究尚处于起步阶段，主要困于取向材料的不稳定性以及缺乏有关多聚物对铁电液晶光物理特性影响的研究等。本项目旨在针对光场快速调控需要，研究聚合物网络稳定的光取向材料对不同模式铁电液晶光物理特性的影响，以期优化取向材料及铁电液晶盒制备参数，并探索稳定光取向层铁电液晶器件在空间结构光场调控中的应用。主要研究包括：①不同材料的光取向层对铁电液晶响应速度、衬比度、电光效应等的影响；②稳定光取向层铁电液晶盒的制备方法及参数优化；③稳定光取向层铁电液晶叉形光栅及q波片等复杂结构的实验实现及性能表征。项目研究结果将为发展具有快速响应的稳定光取向层铁电液晶光场调控器件提供新的理论支持和有效实现途径。

铁电液晶器件因其快速响应的特点而成为实现光场快速调控的重要手段之一。目前的研究主要集中在利用偶氮染料光取向层的可多次擦写性能制作液晶光学器件，对稳定的偶氮染料光取向层以及基于稳定的偶氮染料光取向层铁电液晶的研究尚处于起步阶段，主要困于取向材料的不稳定性以及缺乏有关多聚物对铁电液晶光物理特性影响的研究等。本项目旨在针对光场快速调控需要，研究聚合物网络稳定的光取向材料对不同模式铁电液晶光物理特性的影响，以期优化取向材料及铁电液晶盒制备参数，并索稳定光取向层铁电液晶器件在空间结构光场调控中的应用。主要研究包括：①不同材料的光取向层对铁电液晶响应速度、衬比度、电光效应等的影响；②稳定光取向层铁电液晶盒的制备方法及参数优化；③稳定光取向层铁电液晶叉形光栅及q波片等复杂结构的实验实现及性能表征。项目研究结果将为发展具有快速响应的稳定光取向层铁电液晶光场调控器件提供新的理论支持和有效实现途径。目前已完成对热稳定及光稳定的光取向层材料稳定型探索，采用稳定后的取向材料制备的铁电液晶器件具有响应速度快、对比度高、分辨率高等优点，为将该技术应用于新型快速响应显示领域提供新的理论及技术依据。因此，该项工作是有意义的且与项目研究背景相关，具有实际的应用价值的。