Published/Posted: March 1, 2016
Authors: M. Mittendorff, R. J. Suess, T. E. Murphy, H. Schneider, M. Helm and S. WinnerlAbstract: We present an experimental far-infrared pump-probe study on multilayer epitaxial graphene that is complemented by a straightforward theoretical model. To gain deeper insights into the pump-induced change in the complex conductivity in the far-infrared, pump-probe measurements recording both transmission and reflection were performed. These measurements reveal a pump-induced increase of the transmission at low pump fluence, and a decreased transmission at high pump fluence due to a strong pump-induced reflection. Modelling the temperature dependent conductivity for interband and intraband processes in combination with an energy balance equation reproduces the observed results.
M. Mittendorff, R. J. Suess, T. E. Murphy, H. Schneider, M. Helm and S. Winnerl, "Pump-induced far-infrared reflection in quasi-intrinsic graphene", APS March Meeting, Baltimore, MD (USA) BAPS.2016.MAR.A17.11 (2016)