Femtosecond Pump-Probe Studies of Reduced Graphene Oxide Thin Films

Brian A. Ruzicka; Lalani K. Werake; Hui Zhao; Shuai Wang; Kian Ping Loh

doi:10.1063/1.3421541

Femtosecond Pump-Probe Studies of Reduced Graphene Oxide Thin Films

Mesoscale and Nanoscale Physics 2015-05-18 v2 Materials Science Optics

Authors: Brian A. Ruzicka , Lalani K. Werake , Hui Zhao , Shuai Wang , Kian Ping Loh

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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.

Keywords

reduced graphene oxide pump-probe spectroscopy carrier dynamics energy relaxation phase-state filling ultrafast

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@article{arxiv.1003.1972,
  title  = {Femtosecond Pump-Probe Studies of Reduced Graphene Oxide Thin Films},
  author = {Brian A. Ruzicka and Lalani K. Werake and Hui Zhao and Shuai Wang and Kian Ping Loh},
  journal= {arXiv preprint arXiv:1003.1972},
  year   = {2015}
}

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3 pages, 3 figures

Femtosecond Pump-Probe Studies of Reduced Graphene Oxide Thin Films

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