NatureOptical control of integer and fractional Chern insulatorsWilliam HoltzmannWeijie LiEric AndersonJiaqi CaiHeonjoon ParkChaowei HuTakashi TaniguchiKenji WatanabeJiun-Haw ChuDi XiaoTing CaoXiaodong Xu2026-01-28Full textDOI https://doi.org/10.1038/s41586-025-09777-3