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Topological liquid crystal superstructures as structured light lasers [Physics]
Proceedings of the National Academy of Sciences of the United States of America ( IF 11.1 ) Pub Date : 2021-12-07 , DOI: 10.1073/pnas.2110839118
Miha Papič 1 , Urban Mur 2 , Kottoli Poyil Zuhail 1 , Miha Ravnik 1, 2 , Igor Muševič 1, 2 , Matjaž Humar 2, 3, 4
Affiliation  

Liquid crystals (LCs) form an extremely rich range of self-assembled topological structures with artificially or naturally created topological defects. Some of the main applications of LCs are various optical and photonic devices, where compared to their solid-state counterparts, soft photonic systems are fundamentally different in terms of unique properties such as self-assembly, self-healing, large tunability, sensitivity to external stimuli, and biocompatibility. Here we show that complex tunable microlasers emitting structured light can be generated from self-assembled topological LC superstructures containing topological defects inserted into a thin Fabry–Pérot microcavity. The topology and geometry of the LC superstructure determine the structuring of the emitted light by providing complex three-dimensionally varying optical axis and order parameter singularities, also affecting the topology of the light polarization. The microlaser can be switched between modes by an electric field, and its wavelength can be tuned with temperature. The proposed soft matter microlaser approach opens directions in soft matter photonics research, where structured light with specifically tailored intensity and polarization fields could be designed and implemented.



中文翻译:

作为结构光激光器的拓扑液晶超结构 [物理学]

液晶(LCs)形成了极其丰富的自组装拓扑结构,具有人工或自然产生的拓扑缺陷。LC 的一些主要应用是各种光学和光子器件,与固态对应物相比,软光子系统在自组装、自修复、大可调性、对外部的敏感性等独特特性方面有着根本的不同。刺激性和生物相容性。在这里,我们展示了发射结构光的复杂可调谐微激光器可以由自组装拓扑 LC 超结构产生,该超结构包含插入薄法布里-珀罗微腔的拓扑缺陷。LC 上层结构的拓扑结构和几何形状通过提供复杂的三维变化的光轴和有序参数奇异性来确定发射光的结构,这也会影响光偏振的拓扑结构。微型激光器可以通过电场在模式之间切换,其波长可以随温度调节。所提出的软物质微激光方法开辟了软物质光子学研究的方向,可以设计和实现具有专门定制的强度和偏振场的结构光。

更新日期:2021-12-02
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