
浏览全部资源
扫码关注微信
河北工业大学 理学院, 天津 300401
李世龙,男,硕士研究生,2024年于河北科技大学理工学院获得学士学位,主要从事液晶物理及液晶器件物理方面的研究。E-mail:1258393697@qq.com
叶文江,男,博士,教授,2011年于河北工业大学获得博士学位,主要从事液晶物理及液晶器件物理方面的研究。E-mail:wenjiang_ye@hebut.edu.cn
收稿:2026-07-27,
修回:2026-08-21,
纸质出版:2026-09-05
移动端阅览
李世龙, 程昊, 任雨婷, 等. 基于挠曲电效应的场致双模式液晶切换光栅[J]. 液晶与显示, 2026,41(9):1232-1238.
LI Shilong, CHENG Hao, REN Yuting, et al. Field-induced dual-mode switchable liquid crystal grating based on flexoelectric effect[J]. Chinese Journal of Liquid Crystals and Displays, 2026, 41(9): 1232-1238.
李世龙, 程昊, 任雨婷, 等. 基于挠曲电效应的场致双模式液晶切换光栅[J]. 液晶与显示, 2026,41(9):1232-1238. DOI: 10.3724/CJLCD.2026-0141. CSTR: 32172.14.CJLCD.2026-0141.
LI Shilong, CHENG Hao, REN Yuting, et al. Field-induced dual-mode switchable liquid crystal grating based on flexoelectric effect[J]. Chinese Journal of Liquid Crystals and Displays, 2026, 41(9): 1232-1238. DOI: 10.3724/CJLCD.2026-0141. CSTR: 32172.14.CJLCD.2026-0141.
传统液晶切换光栅普遍存在偏振敏感、光栅周期难以连续电控调谐、响应迟缓等问题。为解决上述问题,本文采用一种宽温域(0~65 °C)挠曲电液晶混合体系,结合图案化光取向工艺制备了一种可连续调谐光栅周期、衍射角和衍射效率的双模式液晶切换光栅,该光栅包含两种尺寸差异显著的周期性结构,能够在不同距离处分别产生两种截然不同的衍射信号。零电压下呈现基于光取向图案的小衍射角横向一维衍射;施加电压超过14 V后,基于挠曲电效应的大衍射角十字条纹形衍射被激发;14~26 V电压范围内,光栅周期6.65~1.87 µm连续可调,全量程周期调谐耗时约100 s,相较于传统的光响应胆甾相液晶光栅调控速度提升近12倍。同时,器件偏振依赖性弱,可同步实现光栅周期、衍射角和衍射效率的连续电控调节。该光栅制备工艺简便,无需复杂图案电极结构,在光谱扫描、自适应光束整形、增强现实显示等动态光学场景具备广阔应用潜力,为可调谐液晶光电器件的设计提供了新的技术路径。
Conventional switchable liquid crystal(LC) gratings generally suffer from polarization sensitivity, poor continuous electrical tunability of the grating period, and slow response, which cannot meet the requirements for multi-dimensional and high precision light manipulation in complex optical systems. To address these drawbacks, this work adopts a flexoelectric LC mixture with a broad operating temperature range (0~65 ℃). Combined with patterned photoalignment, we fabricate a dual-mode switchable LC grating capable of continuous tuning of grating period, diffraction angle, and diffraction efficiency. The grating contains two periodic structures with markedly different feature sizes and can generate two distinct diffraction signals at different propagation distances. At zero applied voltage, transverse one-dimensional diffraction with small diffraction angles originating from the photo aligned pattern is observed. When the applied voltage exceeds 14 V, cross-stripe diffraction of large angles originating from the flexoelectric effect is activated. Within the voltage range of 14 V to 26 V, the grating period can be continuously tuned from 6.65 µm to 1.87 µm. The tuning for full range of period takes approximately 100 s, and the tuning speed is nearly 12 times higher than that of conventional light-driven cholesteric LC gratings. Meanwhile, the device exhibits weak polarization dependence and supports simultaneous continuous electrical modulation of grating period, diffraction angle, and diffraction efficiency. It features a simple fabrication procedure without elaborate patterned electrode structures. It holds promising application prospects in dynamic optical scenarios such as spectral scanning, adaptive beam shaping, and augmented reality displays, and provides a new technical route for the design of tunable LC optoelectronic devices.
LUO Y C , ZHAO K Y , DING X , et al . Fast-switching 2D/3D display based on a liquid crystal planar lenticular lens array [J]. Optics Express , 2026 , 34 ( 3 ): 5292 - 5306 . doi: 10.1364/oe.584156 http://dx.doi.org/10.1364/oe.584156
TIAN L L , LI Y , YIN Z , et al . Fast response electrically controlled liquid crystal lens array for high resolution 2D/3D switchable display [J]. Optics Express , 2022 , 30 ( 21 ): 37946 - 37956 . doi: 10.1364/oe.472872 http://dx.doi.org/10.1364/oe.472872
WANG D , LI Y L , CHU F , et al . Color liquid crystal grating based color holographic 3D display system with large viewing angle [J]. Light: Science & Applications , 2024 , 13 ( 1 ): 16 . doi: 10.1038/s41377-023-01375-0 http://dx.doi.org/10.1038/s41377-023-01375-0
XUE X Y , LIEVENS E , BERTELOOT B , et al . Vertical coupling between waveguides and optical fibers utilizing polarization gratings [J]. IEEE Photonics Technology Letters , 2024 , 36 ( 5 ): 309 - 312 . doi: 10.1109/lpt.2024.3352278 http://dx.doi.org/10.1109/lpt.2024.3352278
ZHANG G X , SCHREIER A , WANG X Z , et al . Free-space optical communication link with liquid crystal beam-steering [J]. IEEE Photonics Technology Letters , 2023 , 35 ( 22 ): 1199 - 1202 . doi: 10.1109/lpt.2023.3308774 http://dx.doi.org/10.1109/lpt.2023.3308774
JAU H C , LI Y N , LI C C , et al . Light-driven wide-range nonmechanical beam steering and spectrum scanning based on a self-organized liquid crystal grating enabled by a chiral molecular switch [J]. Advanced Optical Materials , 2015 , 3 ( 2 ): 166 - 170 . doi: 10.1002/adom.201400457 http://dx.doi.org/10.1002/adom.201400457
LIN X W , HU W , HU X K , et al . Fast response dual-frequency liquid crystal switch with photo-patterned alignments [J]. Optics Letters , 2012 , 37 ( 17 ): 3627 - 3629 . doi: 10.1364/ol.37.003627 http://dx.doi.org/10.1364/ol.37.003627
SUN J , SRIVASTAVA A K , WANG L , et al . Optically tunable and rewritable diffraction grating with photoaligned liquid crystals [J]. Optics Letters , 2013 , 38 ( 13 ): 2342 - 2344 . doi: 10.1364/ol.38.002342 http://dx.doi.org/10.1364/ol.38.002342
HU W , SRIVASTAVA A , XU F , et al . Liquid crystal gratings based on alternate TN and PA photoalignment [J]. Optics Express , 2012 , 20 ( 5 ): 5384 - 5391 . doi: 10.1364/oe.20.005384 http://dx.doi.org/10.1364/oe.20.005384
LIU B H , YUAN C L , HU H L , et al . Dynamically actuated soft heliconical architecture via frequency of electric fields [J]. Nature Communications , 2022 , 13 ( 1 ): 2712 . doi: 10.1038/s41467-022-30486-2 http://dx.doi.org/10.1038/s41467-022-30486-2
YUAN C L , CHEN J J , LIU B H , et al . Hyper-stable field-stimulated soft cholesteric heliconical architectures [J]. Matter , 2023 , 6 ( 10 ): 3555 - 3573 . doi: 10.1016/j.matt.2023.07.027 http://dx.doi.org/10.1016/j.matt.2023.07.027
YUAN C L , HUANG W B , ZHENG Z G , et al . Stimulated transformation of soft helix among helicoidal, heliconical, and their inverse helices [J]. Science Advances , 2019 , 5 ( 10 ): eaax9501 . doi: 10.1126/sciadv.aax9501 http://dx.doi.org/10.1126/sciadv.aax9501
ZHU J L , LU J G , QIANG J , et al . 1D/2D switchable grating based on field-induced polymer stabilized blue phase liquid crystal [J]. Journal of Applied Physics , 2012 , 111 ( 3 ): 033101 . doi: 10.1063/1.3680875 http://dx.doi.org/10.1063/1.3680875
CHENG H , LIN R L , AN R , et al . Field-induced 1D/2D switchable grating based on a polymer-dispersed liquid crystal [J]. Optics Letters , 2025 , 50 ( 13 ): 4218 - 4221 . doi: 10.1364/ol.566920 http://dx.doi.org/10.1364/ol.566920
雷志锴 , 丁巍 , 程昊 , 等 . 基于湿气发电机的自供电聚合物分散液晶光栅 [J]. 液晶与显示 , 2026 , 41 ( 6 ): 793 - 799 .
LEI Z K , DING W , CHENG H , et al . Self-powered polymer dispersed liquid crystal grating based on moisture generator [J]. Chinese Journal of Liquid Crystals and Displays , 2026 , 41 ( 6 ): 793 - 799 . (in Chinese)
WU N F , SUN Y X , HU J T , et al . Intelligent nanophotonics: when machine learning sheds light [J]. eLight , 2025 , 5 ( 1 ): 5 . doi: 10.1186/s43593-025-00085-x http://dx.doi.org/10.1186/s43593-025-00085-x
DONG Y B , BAI Y C , ZHANG Q M , et al . High-throughput optical neuromorphic graphic processing at millions of images per second [J]. eLight , 2025 , 5 ( 1 ): 29 . doi: 10.1186/s43593-025-00106-9 http://dx.doi.org/10.1186/s43593-025-00106-9
HAN Q H , ELSTON S J , KAMAL W , et al . A nonlinear model of flexoelectric liquid crystal diffraction gratings [J]. Optics & Laser Technology , 2025 , 180 : 111502 . doi: 10.1016/j.optlastec.2024.111502 http://dx.doi.org/10.1016/j.optlastec.2024.111502
SHIN Y , ZHOU Z Y , HALDER S , et al . Reconfigurable liquid crystal diffraction grating based on flexoelectric effect [J]. Journal of Molecular Liquids , 2022 , 357 : 119150 . doi: 10.1016/j.molliq.2022.119150 http://dx.doi.org/10.1016/j.molliq.2022.119150
CHENG H , LI Y T , WANG J X , et al . Tunable broad-temperature-range grating based on the liquid crystal flexoelectric effect and its spectral scanning: forming one-dimensional, two-dimensional, and annular diffraction patterns at different orientations [J]. Physical Review Applied , 2025 , 24 ( 5 ): 054020 . doi: 10.1103/vy5t-6c35 http://dx.doi.org/10.1103/vy5t-6c35
VARANYTSIA A , CHIEN L C . Giant flexoelectro-optic effect with liquid crystal dimer CB7CB [J]. Scientific Reports , 2017 , 7 ( 1 ): 41333 . doi: 10.1038/srep41333 http://dx.doi.org/10.1038/srep41333
LIU X , DUAN X , LI B Y , et al . Liquid crystal on metasurfaces toward dynamic photonic control [J]. Advanced Functional Materials , 2026 , 36 ( 40 ): e29188 . doi: 10.1002/adfm.202529188 http://dx.doi.org/10.1002/adfm.202529188
HU W , SRIVASTAVA A K , LIN X W , et al . Polarization independent liquid crystal gratings based on orthogonal photoalignments [J]. Applied Physics Letters , 2012 , 100 ( 11 ): 111116 . doi: 10.1063/1.3694921 http://dx.doi.org/10.1063/1.3694921
王俊辉 , 刘璇 , 段霞 , 等 . 基于图案化宾主液晶的光刻掩膜板制备 [J]. 液晶与显示 , 2025 , 40 ( 6 ): 846 - 853 . doi: 10.37188/cjlcd.2025-0050 http://dx.doi.org/10.37188/cjlcd.2025-0050
WANG J H , LIU X , DUAN X , et al . Fabrication of photomask based on patterned guest-host liquid crystal [J]. Chinese Journal of Liquid Crystals and Displays , 2025 , 40 ( 6 ): 846 - 853 . (in Chinese) . doi: 10.37188/cjlcd.2025-0050 http://dx.doi.org/10.37188/cjlcd.2025-0050
杜莹 , 陈梅蕊 , 刘禹彤 , 等 . 基于掩模光刻的液晶波前校正器设计与制备 [J]. 中国光学(中英文) , 2024 , 17 ( 2 ): 324 - 333 . doi: 10.37188/co.2023-0137 http://dx.doi.org/10.37188/co.2023-0137
DU Y , CHEN M R , LIU Y T , et al . Design and fabrication of liquid crystal wavefront corrector based on mask lithography [J]. Chinese Optics , 2024 , 17 ( 2 ): 324 - 333 . (in Chinese) . doi: 10.37188/co.2023-0137 http://dx.doi.org/10.37188/co.2023-0137
CHEN H F , TAO X Y , ZHU B H , et al . Reconfigurable nonlinear Pancharatnam-Berry diffractive optics with photopatterned ferroelectric nematics [J]. Light: Science & Applications , 2025 , 14 ( 1 ): 314 . doi: 10.1038/s41377-025-01981-0 http://dx.doi.org/10.1038/s41377-025-01981-0
WU Y H , WU S B , LIU C , et al . Light-driven pitch tuning of self-assembled hierarchical gratings [J]. Crystals , 2021 , 11 ( 4 ): 326 . doi: 10.3390/cryst11040326 http://dx.doi.org/10.3390/cryst11040326
0
浏览量
64
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621