Graphene-based hyperbolic metasurfaces

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We explore the electromagnetic response of ultrathin metasurfaces realized by densely-packed arrays of graphene strips. We analyze various topologies of propagation bands supported by this structure, ranging from the canalization regime found at a few terahertz (THz), hyperbolic responses present at a few dozens of THz, and anisotropic elliptic TE and TM regimes that arise at mid-infrared frequencies. Interestingly, this configuration can be tuned by exploiting graphene's field effect. We also study the influence of the intrinsic spatial dispersion of graphene, demonstrating that it imposes a wavenumber cutoff on the hyperbolic dispersion diagram that is inversely proportional to the Fermi velocity of electrons in the material. In addition, we show how spatial dispersion limit the maximum enhancement of the spontaneous emission rate of emitters located nearby. Our findings may lead to the development of exciting reconfigurable plasmonic devices with direct application in hyperlenses, sensing, imaging, and on-chip communications.

Original languageEnglish (US)
Title of host publication2016 10th European Conference on Antennas and Propagation, EuCAP 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9788890701863
DOIs
StatePublished - May 31 2016
Externally publishedYes
Event10th European Conference on Antennas and Propagation, EuCAP 2016 - Davos, Switzerland
Duration: Apr 10 2016Apr 15 2016

Other

Other10th European Conference on Antennas and Propagation, EuCAP 2016
CountrySwitzerland
CityDavos
Period4/10/164/15/16

Keywords

  • Graphene
  • Hyperbolic
  • Metasurfaces
  • Spatial dispersion
  • Surface Plasmons

ASJC Scopus subject areas

  • Radiation
  • Computer Networks and Communications
  • Instrumentation

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  • Cite this

    Gomez Diaz, J. S., & Alu, A. (2016). Graphene-based hyperbolic metasurfaces. In 2016 10th European Conference on Antennas and Propagation, EuCAP 2016 [7481165] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EuCAP.2016.7481165