Photonic Torons

Tunable Spin Monopoles

First realization of torons in vector structured light, with topological transitions among diverse 3D states and continuous tuning of chirality and monopole helicity.

Wu, Haijun · Wang, Haiwen · Zhu, Zhihan · Qiu, Chengwei · Shen, Yijie

Physical Review Letters 2025

Advantages

Demonstrated topological transitions among torons, hopfions, skyrmioniums and monopole pairs

Continuously tuned toron chirality and monopole helicity