Broadband coloured skyrmions generated by on-chip ferroelectric spherulites

Yuanfeng Liu; Liuhao Zhu; Xi Xie; Haoran Zhang; Weibo Gao; Bing Gu; Youcheng Xu; Le Zhou; Yongzheng Wen; Jingbo Sun; Yijie Shen; Ji Zhou

doi:10.1186/s43593-026-00132-1

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Broadband coloured skyrmions generated by on-chip ferroelectric spherulites

eLight Vol. 6, (2026)

Research Article | Updated：2026-07-21

- Broadband coloured skyrmions generated by on-chip ferroelectric spherulites
- Affiliations：
- Author bio：
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- DOI：10.1186/s43593-026-00132-1
  CLC：
- Received：17 December 2025，
  
  Revised：2026-03-16，
  
  Accepted：23 March 2026，
  
  Online First：11 May 2026，
  
  Published：2026-12
- Accepted：
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Yuanfeng Liu, Liuhao Zhu, Xi Xie, et al. Broadband coloured skyrmions generated by on-chip ferroelectric spherulites[J]. eLight, 2026, 6.
DOI：

Yuanfeng Liu, Liuhao Zhu, Xi Xie, et al. Broadband coloured skyrmions generated by on-chip ferroelectric spherulites[J]. eLight, 2026, 6. DOI： 10.1186/s43593-026-00132-1.

摘要

Abstract

Optical skyrmions

particle-like topological textures of light with resilience to perturbation

hold great promise for next-generation robust information carriers. Recent advances have enabled their efficient generation and modulation in both classical and quantum regimes via artificial nanostructures with certain topological landscapes. However

existing studies are largely confined to (quasi)monochromatic domain

because the resonance-based linear and nonlinear light-matter interactions are constrained by narrowband response and strong spectral dispersion. Therefore

the exploration of coloured and white light skyrmions is virtually zero

blocking their extension to broadband information technologies. Here

we present an ultra-compact micro-generator that generates ultra-broadband coloured skyrmions from a natural ferroelectric spherulite crystal through the combined action of the photonic spin-orbital coupling and optical focusing. This approach circumvents the resonance effects intrinsic to artificially nanostructured optical systems. The resulting polychromatic skyrmions cover the entire visible spectral range and can propagate over an appreciable distance in free space. Their topological textures can be continually modulated by tuning the polarization of the incident beam

enabling switching among multiple topologies

such as skyrmions

biskyrmions

and quadrumerons. Furthermore

we reported the experimental evidence of spontaneous parametric down conversion process occurring within the ferroelectric spherulite

which implies the possibility to generate the correlated topological quantum states in further research. These distinctive features will revolutionize modern informatic applications spanning optical communication

data storage

and topological photonic devices.

关键词

Keywords

references

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