Polymer network liquid crystal grating/Fresnel lens fabricated by holography
Polymer network liquid crystal grating/Fresnel lens fabricated by holography
复制标题
全息法制作的聚合物网络液晶光栅/菲涅尔透镜
DOI：
10.1080/02678292.2016.1254295
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发表时间：
2017-01-01
期刊：
影响因子：
2.2
通讯作者：
Su, Yikai
中科院分区：
文献类型：
--
作者：
Huang, Shuaijia;Li, Yan;Su, Yikai
本文采用全息术制作了聚合物网络液晶(PNLC)光栅/菲涅耳透镜。通过干涉两个平面波前得到了光栅的曝光光图样，通过干涉一个平面波前和一个球面波面得到了菲涅耳图样。由于聚合物网络的取向效应和锚定能力，全息PNLC光栅在保持亚毫秒响应的同时，提高了衍射效率，与全息聚合物分散液晶和全息聚合物稳定蓝相液晶相比，工作电压显著降低(降低80%)。此外，由于全息制作，它获得了2μm光栅周期的高空间频率。全息PNLC菲涅耳透镜也显示出诱人的电光特性。图形摘要
ABSTRACT In this article, polymer network liquid crystal (PNLC) grating/Fresnel lens is fabricated by holography. The exposure light pattern for the grating is obtained by interfering two planar wave fronts, while the Fresnel pattern is achieved by interfering a planar wave front and a spherical wave front. Owing to the alignment effect and anchoring power of polymer network, the holographic PNLC grating achieves improved diffraction efficiency, and remarkably reduced operation voltage (reduced by 80%) compared with holographic polymer-dispersed-liquid-crystal and holographic polymer-stabilised blue-phase liquid-crystal gratings, while maintaining submillisecond response. Moreover, it achieves high spatial frequency with a 2-μm grating period, thanks to the holographic fabrication. The holographic PNLC Fresnel lens also exhibits attractive electro-optical properties. Graphical Abstract