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Femtosecond pump-probe studies of reduced graphene oxide thin films
Ruzicka, Brian Andrew Werake, Lalani Kumari Zhao, Hui Wang, Shuai Loh, Kian Ping
Ruzicka, Brian Andrew
Werake, Lalani Kumari
Zhao, Hui
Wang, Shuai
Loh, Kian Ping
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Abstract
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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Date
2010-04
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American Institute of Physics
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Mesoscale and Nanoscale Physics, Optics, Materials Science
Citation
B.A. Ruzicka, L.K. Werake, Hui Zhao, S. Wang, and K.P. Loh, Femtosecond pump-probe studies of reduced graphene oxide thin films, Applied Physics Letters, 96, 173106 (2010).