Researches achieve ultrafast and tunable terahertz-to-visible light conversion using graphene

https://www.graphene-info.com/researches-achieve-ultrafast-and-tunable-terahertz-visible-light-conversion

"switchable sub-nanosecond time scale... tunable on/off ratio >30 for emitted visible light... electrical gate voltage 1 V... grating-graphene metamaterial leads to increased THz-induced emitted visible range 2 orders magnitude... upconverting photon energies factor of 1000... high harmonics... highly doped graphene or grating-graphene metamaterial... sub-nanosecond controlled by electrostatic gating... THz-induced thermal radiation mechanism, carrier heating, visible photons... information and communication"

Related: Researchers announce graphene plasmon breakthrough to advance photonic-electronic technology

https://www.graphene-info.com/researchers-announce-graphene-plasmon-breakthrough-advance-photonic-electronic