Broadband light-induced absorbance change in multilayer graphene
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Published on: July 24, 2015
Petr A Obraztsov1, Maxim G Rybin, Anastasia V Tyurnina
1Department of Physics and Mathematics, University of Eastern Finland, Joensuu, Finland.
Abstract:
We report the ultrafast light-induced absorbance change in CVD-grown multilayer graphene. Using femtosecond pump-probe measurements in 1100-1800 nm spectral range, we revealed broadband absorbance change when the probe photon energy was higher than that of the pump photon. The observed phenomenon is interpreted in terms of the Auger recombination and impact ionization playing a significant role in the dynamics of photoexcited carriers in graphene.
