Pump-induced far-infrared reflection in quasi-intrinsic graphene

ORAL

Abstract

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.

–

Authors

  • Martin Mittendorff

    • University of Maryland, College Park, MD 20742, USA

  • Ryan J. Suess

    • University of Maryland, College Park, MD 20742, USA

  • Thomas E. Murphy

    • University of Maryland-College Park, Institute for Research in Electronics and Applied Physics
    • University of Maryland, College Park, MD 20742, USA

  • Harald Schneider

    • Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany

  • Manfred Helm

    • Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany

  • Stephan Winnerl

    • Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany