Ferroelectric topologies in BaTiO3 nanomembranes for light field manipulation

IF 38.1 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nature nanotechnology Pub Date : 2025-04-23 DOI:10.1038/s41565-025-01919-y

Haoying Sun, Pengcheng Chen, Wei Mao, Changqing Guo, Yueying Li, Jierong Wang, Wenjie Sun, Duo Xu, Bo Hao, Tingjun Zhang, Jianan Ma, Jiangfeng Yang, Zhequan Cao, Shengjun Yan, Yuze Guan, Zonghan Wen, Zhangwen Mao, Ningchong Zheng, Zhengbin Gu, Houbing Huang, Peng Wang, Yong Zhang, Di Wu, Yuefeng Nie

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Abstract

Ferroelectric topological textures in oxides exhibit exotic dipole-moment configurations that would be ideal for nonlinear spatial light field manipulation. However, conventional ferroelectric polar topologies are spatially confined to the nanoscale, resulting in a substantial size mismatch with laser modes. Here we report a dome-shaped ferroelectric topology with micrometre-scale lateral dimensions using nanometre-thick freestanding BaTiO₃ membranes and demonstrate its feasibility for spatial light field manipulation. The dome-shaped topology results from a radial flexoelectric field created through anisotropic lattice distortion, which, in turn, generates centre-convergent microdomains. The interaction between the continuous curling of dipoles and light promotes the conversion of circularly polarized waves into vortex light fields through nonlinear spin-to-orbit angular momentum conversion. Further dynamic manipulation of vortex light fields can also be achieved by thermal and electrical switching of the polar topology. Our work highlights the potential for other ferroelectric polar topologies in light field manipulation.

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用于光场操纵的 BaTiO3 纳米膜中的铁电拓扑结构

氧化物中的铁电拓扑结构表现出奇异的偶极矩构型，这将是非线性空间光场操纵的理想选择。然而，传统的铁电极性拓扑结构在空间上局限于纳米尺度，导致与激光模式的尺寸不匹配。在这里，我们报告了一个具有微米级横向尺寸的圆顶型铁电拓扑，使用纳米厚的独立BaTiO3膜，并证明了其空间光场操纵的可行性。圆顶形状的拓扑结构是由各向异性晶格畸变产生的径向柔性电场产生的，这反过来又产生了中心收敛的微畴。偶极子的连续卷曲与光的相互作用促使圆极化波通过非线性自旋-轨道角动量转换转化为涡旋光场。旋涡光场的进一步动态操纵也可以通过极性拓扑的热和电开关来实现。我们的工作强调了其他铁电极性拓扑在光场操纵中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nature nanotechnology 工程技术-材料科学：综合

CiteScore

59.70

自引率

0.80%

发文量

196

审稿时长

4-8 weeks

期刊介绍： Nature Nanotechnology is a prestigious journal that publishes high-quality papers in various areas of nanoscience and nanotechnology. The journal focuses on the design, characterization, and production of structures, devices, and systems that manipulate and control materials at atomic, molecular, and macromolecular scales. It encompasses both bottom-up and top-down approaches, as well as their combinations. Furthermore, Nature Nanotechnology fosters the exchange of ideas among researchers from diverse disciplines such as chemistry, physics, material science, biomedical research, engineering, and more. It promotes collaboration at the forefront of this multidisciplinary field. The journal covers a wide range of topics, from fundamental research in physics, chemistry, and biology, including computational work and simulations, to the development of innovative devices and technologies for various industrial sectors such as information technology, medicine, manufacturing, high-performance materials, energy, and environmental technologies. It includes coverage of organic, inorganic, and hybrid materials.