NDLI: Electrically Controlled Liquid Crystal Microlens Array Based on Single-Crystal Graphene Coupling Alignment for Plenoptic Imaging

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Electrically Controlled Liquid Crystal Microlens Array Based on Single-Crystal Graphene Coupling Alignment for Plenoptic Imaging

Content Provider	MDPI
Author	Chen, Mingce Shao, Qi He, Wenda Wei, Dong Hu, Chai Shi, Jiashuo Liu, Kewei Wang, Haiwei Xie, Changsheng Zhang, Xinyu
Copyright Year	2020
Description	As a unique electric-optics material, liquid crystals (LCs) have been used in various light-control applications. In LC-based light-control devices, the structural alignment of LC molecules is of great significance. Generally, additional alignment layers are required for LC lens and microlens, such as r믭 polyimide (PI) layers or photoalignment layers. In this paper, an electrically controlled liquid crystal microlens array (EC-LCMLA) based on single-crystal graphene (SCG) coupling alignment is proposed. A monolayer SCG with high conductivity and initial anchoring of LC molecules was used as a functional electrode, thus no additional alignment layer is needed, which effectively simplifies the basic structure and process flow of conventional LCMLA. Experiments indicated that a uniform LC alignment can be acquired in the EC-LCMLA cell by the SCG coupling alignment effect. The common optical properties including focal lengths and point spread function (PSF) were measured experimentally. Experiments demonstrated that the proposed EC-LCMLA has good focusing performance in the visible to near-infrared range. Moreover, the plenoptic imaging in Galilean mode was achieved by integrating the proposed EC-LCMLA with photodetectors. Digital refocusing was performed to obtain a rendering image of the target.
Starting Page	1039
e-ISSN	2072666X
DOI	10.3390/mi11121039
Journal	Micromachines
Issue Number	12
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2020-11-26
Access Restriction	Open
Subject Keyword	Micromachines Telecommunications Liquid Crystal (lc) Device Single-crystal Graphene (scg) Alignment Plenoptic Imaging
Content Type	Text
Resource Type	Article

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