液晶与显示2017，Vol.32Issue(2)：84-90,7.DOI:10.3788/YJYXS20173202.0084
空间调制光传播方向及偏振态的多层图案化液晶聚合物薄膜研究
Multi-layer patterned liquid crystal polymer thin films for spatially modulating light propagation directions and polarizations
赵晨项 1樊帆 1杜涛 1CHIGRINOV V G 1郭海成1
作者信息
- 1. 香港科技大学先进显示与光电子技术国家重点实验室,香港
- 折叠
摘要
Abstract
In this article,an advanced optical thin film structure for spatially modulating light propagation directions and polarizations is introduced.The optical structure is composed of multi-layer patterned birefringence thin films,of which each thin film is formed by a liquid crystal (LC) polymer layer with spatially varying optical axes controlled by a patterned photoalignment layer.The optical modulator has two functional layers,where the first layer is designed as patterned polarization grating with spatially varying grating vectors to spatially steer light propagation directions,and the second layer is a patterned retardation film for controlling the output light polarizations.The overall thickness of the multi-layer films,excluding thesubstrate,can be less than 1μm,which offers the flexibility to generate high resolution light wavefront structure.As a result,the optical thin film can be ideally working as a photomask for exposure on a LC photoalignment layer to generate multi-domain alignment structures,which can be applied for the manufacturing and designing of modern liquid crystal display.To verify the effectiveness of the proposed photomask,a periodic two domain thin film structure has been designed and fabricated and a liquid crystal cell with two-domain alignment structure has been successfully fabricated in a single exposure with the photomask.The proposed optical thin film has unique functions in modulating light propagating directions and polarizations,which has great potential to find applications on micro-fabrication,3D display,optical communication,optical computing and optical switching,etc.关键词
液晶/聚合物薄膜结构/偏振光栅/光调制器/图案化光配向Key words
liquid crystal/polymer thin film/polarization grating/light modulator/patterned photoalignment分类
信息技术与安全科学引用本文复制引用
赵晨项,樊帆,杜涛,CHIGRINOV V G,郭海成..空间调制光传播方向及偏振态的多层图案化液晶聚合物薄膜研究[J].液晶与显示,2017,32(2):84-90,7.
