Light-regulated soliton dynamics in liquid crystals

Ke-Hui Wu, Li-Ting Zhu, Fang-Fang Xiao, Xuejia Hu, Sen-Sen Li () and Lu-Jian Chen ()
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Ke-Hui Wu: Xiamen University
Li-Ting Zhu: Xiamen University
Fang-Fang Xiao: Xiamen University
Xuejia Hu: Xiamen University
Sen-Sen Li: Xiamen University
Lu-Jian Chen: Xiamen University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Electrically powered solitons are particle-like field configurations in out-of-equilibrium nematics that have garnered significant interest. However, their random generation and lack of controllable motion have limited their application. Here, we present a reconfigurable optoelectronic approach capable of regulating the entire lifecycle of solitons by utilizing multi-strategy digital light projection to construct delicate patterning of virtual electrode. We demonstrate that optically actuated domains with diverse geometry enable the generation of multiple solitons and further allow in-situ formation of individual soliton by matching the light pattern to its dimension. Exquisitely engineered light intensity of patterns facilitates modulation of soliton velocity and transformation of propagating direction. The utilization of a light-guided channel enables the on-demand control of soliton trajectories along customized paths. Furthermore, dynamic light patterns that vary in space and time allow for collective motion such as migration, mimicking phototaxis in biological systems. This reconfigurable manipulation strategy, grounded in the photoconductive effect, proves highly versatile and effective in directing soliton dynamics, heralding the potential for their programmable control and offering a significant advantage in multitasking scenarios.

Date: 2024
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DOI: 10.1038/s41467-024-51383-w

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