Title :
Nonlinear transmission dynamics in graphene close to the Dirac point
Author :
Winnerl, S. ; Orlita, M. ; Plochocka, P. ; Kossacki, P. ; Potemski, M. ; Winzer, T. ; Malic, E. ; Knorr, A. ; Sprinkle, M. ; Berger, C. ; de Heer, W.A. ; Schneider, H. ; Helm, M.
Author_Institution :
Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Abstract :
We report on carrier relaxation dynamics close to the Dirac point in epitaxially grown graphene under pulsed excitation with 10-250 meV photons. With decreasing photon energy, we identify different regimes - induced transmission with bi- and single-exponential decay as well as induced absorption - and discuss their physical origin.
Keywords :
carrier relaxation time; epitaxial layers; graphene; Dirac point; biexponential decay; carrier relaxation dynamics; electron volt energy 10 meV to 250 meV; epitaxially grown graphene; nonlinear transmission dynamics; single-exponential decay; Absorption; Optical pulses; Optical pumping; Optical scattering; Phonons; Photonics;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6105036
