Broadband Light-Induced Absorbance Change in Multilayer Graphene

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...

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Bibliographic Details
Published in:Nano letters 2011-04, Vol.11 (4), p.1540-1545
Main Authors: Obraztsov, Petr A, Rybin, Maxim G, Tyurnina, Anastasia V, Garnov, Sergey V, Obraztsova, Elena D, Obraztsov, Alexander N, Svirko, Yuri P
Format: Article
Language:English
Subjects:
Graphite - chemistry
Light
Materials Testing
Nanostructures - chemistry
Nanostructures - ultrastructure
Particle Size
Scattering, Radiation
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Summary: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.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl104303c