Fang Qipeng, Liu Jinbo, Yan Zhanjun, Deng Qiling, Pang Hui, Lv Yongmo, Sun Xiuhui, Chen Jianjun, Jiang Haibo, Yin Shaoyun
Opt Lett. 2022 Jul 1;47(13):3195-3198. doi: 10.1364/OL.461386.
In this Letter, a contact polarization holographic photoalignment method is proposed. In the holographic recording, a phase mask is contacted with a photoalignment film, making light carrying wavefront information interfere with reference light in the near-field region to realize polarization holographic pattern recording with a sub-micrometer feature size. The relevant theoretical derivation is given, and holographic recording of a 0.4 µm feature-size phase mask is realized. The proposed method can conveniently realize liquid-crystal binary diffractive optical elements with a sub-micrometer feature size. Off-axis diffraction can also be realized by superimposing the grating information by changing the angle between the substrate and the interference light.
在本信函中，提出了一种接触极化全息光控取向方法。在全息记录过程中，将相位掩膜与光控取向膜接触，使携带波前信息的光在近场区域与参考光发生干涉，以实现具有亚微米特征尺寸的极化全息图案记录。给出了相关理论推导，并实现了特征尺寸为0.4 µm的相位掩膜的全息记录。该方法能够方便地实现具有亚微米特征尺寸的液晶二元衍射光学元件。通过改变基底与干涉光之间的角度来叠加光栅信息，还可实现离轴衍射。
