Nature CommunicationsPump-threshold-free frequency comb via cavity Floquet engineeringSihan WangCheng WangMatthijs H. J. de JongLaure Mercier de LépinayJingwei ZhouMika A. SillanpääYulong Liu2026-04-28Full textDOI https://doi.org/10.1038/s41467-026-72320-z