期刊
NANO LETTERS
卷 14, 期 3, 页码 1504-1507出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl404730y
关键词
graphene; carrier-dynamics; anisotropy; collinear scattering
类别
资金
- German Research Foundation (DFG) [SPP 1459]
We present a pump probe experiment on graphene, which reveals a pronounced dependence of the pump-induced transmission on the angle between pump and probe polarization. It reflects a strong anisotropy of the pump-induced occupation of photogenerated carriers in momentum space. Within 150 fs after excitation, an isotropic carrier distribution is established. The experiments are well described by microscopic modeling, which identifies carrier-phonon scattering to be the main relaxation mechanism giving rise to an isotropic carrier distribution.
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