Reztsov Tikhon V, Chernykh Aleksey V, Orlova Tetiana, Petrov Nikolay V
Research and Educational Center for Photonics and Optical IT, ITMO University, 3 Kadetskaya Liniya V.O., bld. 2, lit. A, Saint Petersburg 197101, Russia.
Infochemistry Scientific Center, ITMO University, 9 Lomonosova Str., Saint Petersburg 197101, Russia.
Polymers (Basel). 2025 Jul 2;17(13):1849. doi: 10.3390/polym17131849.
Topological orientation structures in chiral nematic liquid crystals, such as torons, exhibit promising optical properties and are of increasing interest for applications in photonic devices. However, despite this attention, their polarization and phase dynamics during formation remain insufficiently explored. In this work, we investigate the dynamic optical response of a toron generated by focused femtosecond infrared laser pulses. A custom-designed polarization holographic microscope is employed to simultaneously record four polarization-resolved interferograms in a single exposure. This enables the real-time reconstruction of the Jones matrix, providing a complete description of the local polarization transformation introduced by the formation of the topological structure. The study demonstrates that torons can facilitate spin-orbit coupling of light in a manner analogous to q-plates, highlighting their potential for advanced vector beam shaping and topological photonics applications.
手性向列型液晶中的拓扑取向结构，如torons，具有良好的光学特性，在光子器件中的应用越来越受到关注。然而，尽管受到了这种关注，它们在形成过程中的偏振和相位动力学仍未得到充分探索。在这项工作中，我们研究了由聚焦飞秒红外激光脉冲产生的toron的动态光学响应。使用定制设计的偏振全息显微镜在单次曝光中同时记录四个偏振分辨干涉图。这使得能够实时重建琼斯矩阵，从而完整描述由拓扑结构形成引入的局部偏振变换。该研究表明，torons能够以类似于q波片的方式促进光的自旋-轨道耦合，突出了它们在先进矢量光束整形和拓扑光子学应用中的潜力。
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