Femtosecond Pump-Probe Studies of Reduced Graphene Oxide Thin Films

Details Femtosecond Pump-Probe Studies of Reduced Graphene Oxide Thin Films Femtosecond Pump-Probe Studies of Reduced Graphene Oxide Thin Films

2010-03-09

arxiv.org/abs/1003.1972v2

Appl. Phys. Lett. 96, 173106 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 3 figures

Scientific paper

The dynamics of photocarriers in reduced graphene oxide thin films is studied by using ultrafast pump-probe spectroscopy. Time dependent differential transmissions are measured with sample temperatures ranging from 9 to 300 K. At each sample temperature and probe delay, the sign of differential transmission remains positive. A fast energy relaxation of hot carriers is observed, and is found to be independent of sample temperature. Our experiments show that the carrier dynamics in reduced graphene oxide is similar to other types of graphene, and that the differential transmission is caused by phase-state filling of carriers.

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