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Applied Physics Letters / Volume 98 / Issue 12 / STRUCTURAL, MECHANICAL, THERMODYNAMIC, AND OPTICAL PROPERTIES OF CONDENSED MATTER

Appl. Phys. Lett. 98, 121905 (2011); http://dx.doi.org/10.1063/1.3570640 (3 pages)

Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide

Xin Zhao1, Zhi-Bo Liu1, Wei-Bo Yan2, Yingpeng Wu2, Xiao-Liang Zhang1, Yongsheng Chen2, and Jian-Guo Tian1

1Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics School, School of Physics, Nankai University, Tianjin 300457, People’s Republic of China
2Key Laboratory for Functional Polymer Materials and Centre for Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China

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(Received 7 January 2011; accepted 3 March 2011; published online 22 March 2011)

Ultrafast carrier dynamics and saturable absorption of few-layered graphene oxide, well-dispersed in organic solvent, are studied using femtosecond pump-probe and Z-scan techniques. The results demonstrate that few-layered graphene oxide has a fast energy relaxation of hot carriers and strong saturable absorption, which is comparable with that of reduced graphene oxide. Fast carrier relaxation combined with well solution processing capability arises from the large fraction of sp2 carbon atom inside the few-layered graphene oxide sheet together with oxidation mainly existing at the edge areas. This superiority of few-layered graphene oxide will facilitate potential applications of graphene for ultrafast photonics.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

carrier relaxation time, graphene, high-speed optical techniques, hot carriers, infrared spectra, optical pumping, optical saturable absorption, oxidation, photoluminescence, Raman spectra, ultraviolet spectra, visible spectra

PACS

  • 78.47.J-

    Ultrafast spectroscopy (<1 psec)

  • 78.40.Ri

    Fullerenes and related materials

  • 78.30.Na

    Fullerenes and related materials

  • 82.30.-b

    Specific chemical reactions; reaction mechanisms

  • 78.67.Wj

    Optical properties of graphene

  • 78.55.Hx

    Other solid inorganic materials

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3570640

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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