https://doi.org/10.1051/epjconf/20134104023
Ultrafast low-energy dynamics of graphite studied by nonlinear multi-THz spectroscopy
1 Department of Physics and Center for Applied Photonics, University of Konstanz, Universitätsstr. 10, 78464 Konstanz, Germany
2 IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
3 Department of Physics, University of Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany,
Ultraintense few-cycle THz pulses are employed to study the nonlinear response of graphite. A phase sensitive 2D spectroscopy setup is capable of detecting pump-induced transient changes as well as multi-wave mixing processes. The observed strong THz-pump THz-probe signals provide insight into ultrafast dynamics and the spectral response of the low-energy carriers. Here we report the observation of a pump-induced transmission in graphite. The relaxation dynamics shows three distinct time scales, which are assigned to carrier thermalization, phonon emission and a slow cooling down back to equilibrium.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
