Polarization-controllable Airy beams generated via a photoaligned director-variant liquid crystal mask.
Polarization-controllable Airy beams generated via a photoaligned director-variant liquid crystal mask.
复制标题
通过光对准指向矢变化液晶掩模产生偏振可控艾里光束
DOI：
10.1038/srep17484
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发表时间：
2015-12-02
影响因子：
4.6
通讯作者：
Lu YQ
中科院分区：
文献类型：
--
作者：
Wei BY;Chen P;Hu W;Ji W;Zheng LY;Ge SJ;Ming Y;Chigrinov V;Lu YQ
自 2007 年首次演示以来，由于艾里光束具有无衍射、横向加速和自愈等显着特性，对艾里光束的研究呈爆炸式增长。迄今为止，一种简单而紧凑的方法来产生高质量和高效率的艾里光束仍然具有挑战性。在这里，我们提出并演示了一种液晶（LC）偏振艾里掩模（PAM），其特征是空间变化的液晶方位角指向矢。 PAM 是通过偏振敏感配向剂磺酸偶氮染料 SD1 通过光配向 LC 制造的。由于特殊的设计，提出了正交圆偏振双艾里光束之间偏振可控切换的新颖特征。液晶导向器的分子级连续性显着提高了所得艾里光束的质量和效率。此外，由于没有吸收电极，PAM 可以处理强光。还表现出尺寸紧凑、成本低和宽波长容限等其他优点。这项工作解决了艾里光束在光学操纵、生物科学甚至一些未知领域应用的基本要求。
Researches on Airy beams have grown explosively since the first demonstration in 2007 due to the distinguishing properties of nondiffraction, transverse acceleration and self-healing. To date, a simple and compact approach for generating Airy beams in high quality and efficiency has remained challenging. Here, we propose and demonstrate a liquid crystal (LC) polarization Airy mask (PAM) featured by spatially variant LC azimuthal director. The PAM is fabricated through photoaligning LC via a polarization-sensitive alignment agent suophonic azo dye SD1. Thanks to the special design, a novel feature of polarization-controllable switch between dual Airy beams of orthogonal circular polarization is presented. The molecular-level continuity of LC director significantly improves the quality and efficiency of resultant Airy beams. Besides, the PAM can handle intense light due to the absence of absorptive electrodes. Additional merits of compact size, low cost and broad wavelength tolerance are also exhibited. This work settles a fundamental requirement for Airy beam applications of optical manipulations, biology science and even some uncharted territories.