Nature CommunicationsObservation of wave amplification and temporal topological state in a non-synthetic photonic time crystalJiang XiongXudong ZhangLongji DuanJiarui WangYang LongHaonan HouLetian YuLinyang ZouBaile Zhang2025-12-17Full textDOI https://doi.org/10.1038/s41467-025-66154-4