Photonic Torons with 3D Topology Transitions and Tunable Spin Monopoles.

Authors

Haijun Wu, Nilo Mata-Cervera, Haiwen Wang, Zhihan Zhu, Chengwei Qiu, Yijie Shen

Published in

Physical review letters. Volume 135. Issue 6. Pages 063802. Aug 08, 2025.

Abstract

Topological defects and textures play crucial roles in fundamental physics and modern information science. Torons are a class of three-dimensional (3D) chiral topological structures with both skyrmionic quasiparticle textures and monopole point defects, so far only observed in liquid crystals with both polar and nonpolar symmetry. Here, we construct torons with the photonic spin of vector structured light and demonstrate the topological phase transitions among diverse 3D topological states: torons, hopfions, skyrmioniums and monopole pairs. We can also continually tune the toron's chirality and monopole's helicity. The generation of photonic torons opens a platform for studying nontrivial light-matter interaction and topological informatics.

PMID:
40864927
Bibliographic data and abstract were imported from PubMed on 28 Aug 2025.

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