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Proceedings Paper

THz near-field microscopy of graphene structures
Author(s): Oleg Mitrofanov; Wenlong Yu; Robert J. Thompson; Yuxuan Jiang; Igal Brener; Wei Pan; Claire Berger; Walter A. de Heer; Zhigang Jiang
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Paper Abstract

Properties of graphene can be tuned electrically and chemically, providing a promising system for application in terahertz (THz) devices. Graphene response can be enhanced even further by means of coupling electromagnetic waves into plasmon modes, frequency of which is controlled by geometrical parameters. To probe excitation of confined plasmon modes and surface wave excitation, epitaxial graphene and its structures are investigated using THz near-field microscopy. Detected near-field images suggest excitation of THz surface waves occurring at graphene edges, similar to that observed at metallic edges, and excitation of confined plasmon modes. We will also discuss the impact of graphene inhomogeneity on local THz transmission properties on the sub-wavelength scale.

Paper Details

Date Published: 31 January 2014
PDF: 6 pages
Proc. SPIE 8993, Quantum Sensing and Nanophotonic Devices XI, 89932A (31 January 2014); doi: 10.1117/12.2041790
Show Author Affiliations
Oleg Mitrofanov, Univ. College London (United Kingdom)
Sandia National Labs. (United States)
Wenlong Yu, Georgia Institute of Technology (United States)
Robert J. Thompson, Univ. College London (United Kingdom)
Yuxuan Jiang, Georgia Institute of Technology (United States)
Igal Brener, Sandia National Labs. (United States)
Wei Pan, Sandia National Labs. (United States)
Claire Berger, Georgia Institute of Technology (United States)
Institut Néel, CNRS (France)
Walter A. de Heer, Georgia Institute of Technology (United States)
Zhigang Jiang, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 8993:
Quantum Sensing and Nanophotonic Devices XI
Manijeh Razeghi; Eric Tournié; Gail J. Brown, Editor(s)

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