Nanowerk,  June 15, 2023 Several technologies could benefit from the availability of fast and controllable conversion of terahertz light to visible light. An international team of researchers (Germany, Spain, UK) demonstrated that the exceptional properties and dynamics of electronic heat in graphene allow for a THz-to-visible conversion, which is switchable at a sub-nanosecond time scale. They showed a tunable on/off ratio of more than 30 for the emitted visible light, achieved through electrical gating using a gate voltage on the order of 1 V and that a grating-graphene metamaterial leads to an increase in THz-induced emitted power in the visible […]