An Aloysius Wang, Yifei Ma, Zimo Zhao, Yuxi Cai, Stephen M. Morris, Honghui He, Zhenwei Xie, Peng Shi, Yijie Shen, Anatoly V. Zayats, Xiaocong Yuan, Chao He. "Redefining topological robustness in optical polarization fields through a generalized skyrmion number." Nature Communications (2026). https://doi.org/10.1038/s41467-026-75120-7