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Terahertz imaging of inhomogeneous electrodynamics in single-layer graphene embedded in dielectrics

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Abstract
  • We investigate electron transport properties in large-area, single-layer graphene embedded in dielectric media, using free-space terahertz (THz) imaging and time-domain spectroscopy. Sandwiched between a thin polymethyl methacrylate (PMMA) layer and a Si substrate, graphene layers of different growth recipes exhibit distinctive spatial inhomogeneity of sheet conductivity. The non-contacting, non-destructive THz probe reveals that the PMMA layer induces a small, yet noticeable reduction in conductivity. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749280]
  • Keywords: Gas, SIO2
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  • Paul, M., Tomaino, J., Kevek, J., DeBorde, T., Thompson, Z., Minot, E., & Lee, Y. (2012). Terahertz imaging of inhomogeneous electrodynamics in single-layer graphene embedded in dielectrics. Applied Physics Letters, 101(9) doi: 10.1063/1.4749280
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  • 101
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  • 9
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  • This work is supported by the National Science Foundation (DMR-1063632), the Oregon Nanoscience and Microtechnologies Institute, and National Research Foundation of Korea Grant (NRF-2011-220-D00052).
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