Topological transformation and free-space transport of photonic hopfions

IF 20.6 1区 物理与天体物理 Q1 OPTICS Advanced Photonics Pub Date : 2022-07-11 DOI:10.1117/1.ap.5.1.015001
Yijie Shen, Bing-qiang Yu, Hai-Jung Wu, Chun-Yu Li, Zhi-Han Zhu, A. Zayats
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引用次数: 11

Abstract

Structured light fields embody strong spatial variations of polarisation, phase and amplitude. Understanding, characterization and exploitation of such fields can be achieved through their topological properties. Three-dimensional (3D) topological solitons, such as hopfions, are 3D localized continuous field configurations with nontrivial particle-like structures, that exhibit a host of important topologically protected properties. Here, we propose and demonstrate photonic counterparts of hopfions with exact characteristics of Hopf fibration, Hopf index, and Hopf mapping from real-space vector beams to homotopic hyperspheres representing polarisation states. We experimentally generate photonic hopfions with on-demand high-order Hopf indices and independently controlled topological textures, including N\'eel-, Bloch-, and anti-skyrmionic types. We also demonstrate a robust free-space transport of photonic hopfions, thus, showing potential of hopfions for developing optical topological informatics and communications.
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光子跳跃的拓扑变换和自由空间输运
结构化光场体现了偏振、相位和振幅的强烈空间变化。对这些领域的理解、表征和开发可以通过它们的拓扑性质来实现。三维拓扑孤子,如hopfion,是具有非平凡类粒子结构的三维局域连续场配置,表现出许多重要的拓扑保护性质。在这里,我们提出并证明了具有Hopf纤维化、Hopf指数和Hopf映射的Hopf离子的光子对应物,从实空间矢量束到表示偏振态的同位超球。我们通过实验生成了具有按需高阶Hopf指数和独立控制拓扑结构的光子hopfion,包括N’eel-、Bloch-和反skyrmionic类型。我们还证明了光子hopfion的鲁棒自由空间输运,从而展示了hopfion在发展光学拓扑信息学和通信方面的潜力。
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来源期刊
CiteScore
22.70
自引率
1.20%
发文量
49
审稿时长
18 weeks
期刊介绍: Advanced Photonics is a highly selective, open-access, international journal that publishes innovative research in all areas of optics and photonics, including fundamental and applied research. The journal publishes top-quality original papers, letters, and review articles, reflecting significant advances and breakthroughs in theoretical and experimental research and novel applications with considerable potential. The journal seeks high-quality, high-impact articles across the entire spectrum of optics, photonics, and related fields with specific emphasis on the following acceptance criteria: -New concepts in terms of fundamental research with great impact and significance -State-of-the-art technologies in terms of novel methods for important applications -Reviews of recent major advances and discoveries and state-of-the-art benchmarking. The journal also publishes news and commentaries highlighting scientific and technological discoveries, breakthroughs, and achievements in optics, photonics, and related fields.
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