Vectorial lasing with designable topological charges based on Möbius-like correspondence in quasi-BICs

Xinhao Wang; Zhaochen Wu; Jiajun Wang; Lei Shi; Jian Zi

doi:10.1038/s41377-026-02269-7

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Vectorial lasing with designable topological charges based on Möbius-like correspondence in quasi-BICs

Original Articles

- Vectorial lasing with designable topological charges based on Möbius-like correspondence in quasi-BICs
- Vectorial lasing with designable topological charges based on Möbius-like correspondence in quasi-BICs
- Light: Science & Applications 2026年15卷第6期页码：2046-2055
- Affiliations：
  
  1.State Key Laboratory of Surface Physics, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education) and Department of Physics, Fudan University, 200433 Shanghai, China
  2.Shanghai Research Center for Quantum Sciences, 201315 Shanghai, China
  3.Shanghai Key Laboratory of Metasurfaces for Light Manipulation, Fudan University, 200433 Shanghai, China
  4.Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, 200438 Shanghai, China
  5.Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093 Nanjing, China
- Author bio：
  
  Jiajun Wang (jiajunwang@fudan.edu.cn)
  Lei Shi (lshi@fudan.edu.cn)
  Jian Zi (jzi@fudan.edu.cn)
- Funds：
- DOI：10.1038/s41377-026-02269-7
  中图分类号：
- 收稿：2025-09-22，
  
  修回：2026-02-10，
  
  录用：2026-03-03，
  
  网络首发：2026-03-30，
  
  纸质出版：2026-06-30
- Accepted：
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Xinhao Wang, Zhaochen Wu, Jiajun Wang, 等. Vectorial lasing with designable topological charges based on Möbius-like correspondence in quasi-BICs[J]. Light: Science & Applications, 2026,15(6):2046-2055.

Wang, X. H. et al. Vectorial lasing with designable topological charges based on Möbius-like correspondence in quasi-BICs. Light: Science & Applications, 15, 2046-2055 (2026).
Xinhao Wang, Zhaochen Wu, Jiajun Wang, 等. Vectorial lasing with designable topological charges based on Möbius-like correspondence in quasi-BICs[J]. Light: Science & Applications, 2026,15(6):2046-2055. DOI： 10.1038/s41377-026-02269-7.

Wang, X. H. et al. Vectorial lasing with designable topological charges based on Möbius-like correspondence in quasi-BICs. Light: Science & Applications, 15, 2046-2055 (2026). DOI： 10.1038/s41377-026-02269-7.

摘要

Abstract

The ability to control topological properties of laser emission represents a fundamental advancement in photonic technology. Achieving topological lasing in a single compact photonic structure is crucial for device integration and miniaturization

but faces significant challenges for designing both the high-quality (high-Q) mode and radiative topological configurations. Recently

bound states in the continuum (BICs)

as extraordinary states possessing both ultrahigh Q factors and polarization topological charges

have been demonstrated as a promising platform for compact topological lasing. However

as the cornerstone of BIC lasing’s non-trivial properties

topological charges of BICs are protected by real-space structural symmetries

which simultaneously impose fundamental limitations that hinder the designability of lasing topological charges. Here

we propose and experimentally demonstrate a compound cavity design method based on the Möbius-like correspondence in quasi-BICs (q-BICs)

by which compact vectorial lasing with designable topological charges can be realized. We reveal the hidden connection between real-space symmetry breaking and eigen-polarizations of q-BICs from the triangular photonic crystal (PhC) slab

manifesting as a Möbius-like correspondence. By splicing PhC slab sectors utilizing this Möbius-like correspondence

we establish a one-to-one correspondence between compound cavities and their lasing topological charges. Vectorial lasing with designable topological charges from −5 to +5 was experimentally realized. Our work establishes a novel BIC-based platform that enables designable topological lasing

providing a promising route toward compact topological sources.

关键词

Keywords

references

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