基于SLM光刻制备的光电可调控液晶器件

A Photoelectric Adjustable Liquid Crystal Device based on SLM Photoalignment

液晶空间光调制器(SLM,Spatlal Light Modulator)在光信息处理、光束控制、输出显示等诸多领域有着广泛的应用。利用SLM对光的相位调制,以及偶氮液晶的光致异构和Freedericksz转变,进行液晶器件的制备。具体过程是清洗玻璃基板,旋涂取向层,制成液晶盒,以457nm波长激光为光源,通过8位灰度图控制SLM改变光的偏振方向,对液晶取向层进行微米级无掩模图案化光取向。将偶氮液晶灌入液晶盒,使用UV光和交流电场对其调控,制备成颜色可变的液晶显示器件。具有成本低、分辨率高、响应灵敏、色域广等特点。

Liquid crystal spatial Light Modulator(SLM)is widely used in optical information processing,beam control,output dis⁃play and many other fields.The phase modulation of light by SLM and the photoisomerization and Freedericksz transition of azo liq⁃uid crystal were used to fabricate the liquid crystal devices.The specific process is to clean the glass substrate,spin coating the ori⁃entation layer,and make the liquid crystal cell.With a 457nm wavelength laser as the light source,an 8-bit grayscale image is used to control SLM to change the polarization direction of light,and the orientation of the liquid crystal orientation layer is carried out micron-scale maskless patterned light orientation.The azo liquid crystal was injected into the liquid crystal cell and regulated by UV light and AC electric field to prepare the liquid crystal display device with variable color.It has the characteristics of low cost,high resolution,sensitive response and wide color gamut.