In this paper. we present direct time-domain investigations of the relaxation of electric currents in graphene due to hot copyright scattering. We use coherent control with ultrashort optical pulses to photoinject a current and detect the terahertz (THz) radiation emitted by the resulting current surge. We pre-inject a background of hot carriers using a separate pump pulse. https://www.infonoticiasgandia.com/product-category/tamper-evident-labels/