Graphene-based hyperbolic metasurfaces

Juan Sebastian Gomez Diaz; A. Alu

doi:10.1109/EuCAP.2016.7481165

Graphene-based hyperbolic metasurfaces

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	2016 10th European Conference on Antennas and Propagation, EuCAP 2016
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9788890701863
DOIs	https://doi.org/10.1109/EuCAP.2016.7481165
State	Published - May 31 2016
Externally published	Yes
Event	10th European Conference on Antennas and Propagation, EuCAP 2016 - Davos, Switzerland Duration: Apr 10 2016 → Apr 15 2016

Other

Other	10th European Conference on Antennas and Propagation, EuCAP 2016
Country	Switzerland
City	Davos
Period	4/10/16 → 4/15/16

Keywords

Graphene
Hyperbolic
Metasurfaces
Spatial dispersion
Surface Plasmons

ASJC Scopus subject areas

Radiation
Computer Networks and Communications
Instrumentation

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title = "Graphene-based hyperbolic metasurfaces",

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.",

keywords = "Graphene, Hyperbolic, Metasurfaces, Spatial dispersion, Surface Plasmons",

author = "{Gomez Diaz}, {Juan Sebastian} and A. Alu",

year = "2016",

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doi = "10.1109/EuCAP.2016.7481165",

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TY - GEN

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AU - Gomez Diaz, Juan Sebastian

AU - Alu, A.

PY - 2016/5/31

Y1 - 2016/5/31

N2 - 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.

AB - 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.

KW - Graphene

KW - Hyperbolic

KW - Metasurfaces

KW - Spatial dispersion

KW - Surface Plasmons

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DO - 10.1109/EuCAP.2016.7481165

M3 - Conference contribution

AN - SCOPUS:84979207711

BT - 2016 10th European Conference on Antennas and Propagation, EuCAP 2016

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 10th European Conference on Antennas and Propagation, EuCAP 2016

Y2 - 10 April 2016 through 15 April 2016

ER -

Graphene-based hyperbolic metasurfaces

Abstract

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Keywords

ASJC Scopus subject areas

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