High-contrast imaging of graphene via time-domain terahertz spectroscopy

J. L. Tomaino, A. D. Jameson, M. J. Paul, J. W. Kevek, A. M. Van Der Zande, R. A. Barton, H. Choi, P. L. McEuen, E. D. Minot, Yun Shik Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We demonstrate terahertz (THz) imaging and spectroscopy of single-layer graphene deposited on an intrinsic Si substrate using THz time-domain spectroscopy. A singlecycle THz pulse undergoes multiple internal reflections within the Si substrate, and the THz absorption by the graphene layer accumulates through the multiple interactions with the graphene/Si interface.We exploit the large absorption of the multiply reflected THz pulses to acquire high-contrast THz images of graphene. We obtain local sheet conductivity of the graphene layer analyzing the transmission data with thin-film Fresnel formula based on the Drude model.

Original languageEnglish
Pages (from-to)839-845
Number of pages7
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Volume33
Issue number8
DOIs
Publication statusPublished - 2012 Aug

All Science Journal Classification (ASJC) codes

  • Radiation
  • Instrumentation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Tomaino, J. L., Jameson, A. D., Paul, M. J., Kevek, J. W., Van Der Zande, A. M., Barton, R. A., Choi, H., McEuen, P. L., Minot, E. D., & Lee, Y. S. (2012). High-contrast imaging of graphene via time-domain terahertz spectroscopy. Journal of Infrared, Millimeter, and Terahertz Waves, 33(8), 839-845. https://doi.org/10.1007/s10762-012-9889-7