Tunable optical topological transition of Cherenkov radiation

Abstract

Abstract Chasing efficient methods to generate and manipulate Cherenkov radiation (CR) is always the lofty target of many scientific researchers. In this work, by combining the optical topological transition (OTT) of graphene hyperbolic metamaterials (GHMs), we study the properties and clarify the mechanisms of the OTT of CR for the first time. Specifically, we indicate two representative examples to reveal the potential of the OTT in manipulating CR properties and further applications, which correspond to the ultrafast photothermal and nonlocal properties of graphene individually. These results and conclusions pave the way for the photonic devices and applications of CR.