Optical studies of multilayer graphene in magnetic fields

ORAL

Abstract

We report the optical properties of multilayer graphene thin films grown on silicon substrate. The room-temperature reflectance and transmittance of the samples were measured over the energy range from the far-infrared to near-infrared. To extract the optical constants of the films, we analyzed all of the layers of this thin-film structure using a Drude-Lorentz model. From the parameters obtained, we compute the optical constants. With decreasing temperature, the far-infrared transmittance of the samples is increasing up to 4 {\%} down to 2 K. Interestingly, in an applied magnetic field of up to 10 Tesla, the giant positive magneto-optical effects over 20 {\%} are observed in the far-infrared region from 2 K to 300 K. Possible origin of these will be discussed.

*Research at the NSLS is supported by the Department of Energy under contract DE-AC02-98CH10886

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Authors

  • Hsiang-Lin Liu

    • Department of Physics, National Taiwan Normal University

  • G. L. Carr

    • Brookhaven National Laboratory
    • Brookhaven National Laboratory, National Synchrontron Light Source

  • K. A. Worsley

    • Department of Chemistry, University of California-Riverside

  • M. E. Itkis

    • Department of Chemistry, University of California-Riverside

  • E. Bekyarova

    • Department of Chemistry, University of California-Riverside

  • R. C. Haddon

    • Department of Chemistry, University of California-Riverside

  • A. N. Caruso

    • Center for Nanoscale Science and Engineering, North Dakota State University