Reconfigurable terahertz plasmonic antenna concept using a graphene stack

Tamagnone, Michele; Gómez‐Díaz, J. S.; Mosig, J. R.; Perruisseau‐Carrier, Julien

doi:10.1063/1.4767338

Cited by 353 publications

(229 citation statements)

References 10 publications

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“…Furthermore, the Coulomb drag of massless fermions has been experimentally measured 27 , while both intra-and interlayer phenomena in structures surrounded by various dielectrics and their influence in the supported in-phase and out-of-phase plasmons have also been considered 28,29 . Potential applications of graphene stacks include modulators 12 , enhanced metasurfaces 30 , antennas 31 , or plasmonic parallel-plate waveguides 18,32 , among many others. Experimentally, graphene stacks have recently been applied to the development of vertical field effect transistors (FET) transistors 33,34 .…”

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confidence: 99%

Self-biased reconfigurable graphene stacks for terahertz plasmonics

et al. 2015

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The gate-controllable complex conductivity of graphene offers unprecedented opportunities for reconfigurable plasmonics at terahertz and mid-infrared frequencies. However, the requirement of a gating electrode close to graphene and the single 'control knob' that this approach offers limits the practical implementation and performance of these devices. Here we report on graphene stacks composed of two or more graphene monolayers separated by electrically thin dielectrics and present a simple and rigorous theoretical framework for their characterization. In a first implementation, two graphene layers gate each other, thereby behaving as a controllable single equivalent layer but without any additional gating structure. Second, we show that adding an additional gate allows independent control of the complex conductivity of each layer within the stack and provides enhanced control on the stack equivalent complex conductivity. These results are very promising for the development of THz and mid-infrared plasmonic devices with enhanced performance and reconfiguration capabilities.

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mentioning

confidence: 99%

Self-biased reconfigurable graphene stacks for terahertz plasmonics

et al. 2015

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“…The resulting gain and radiation efficiency, validated numerically, were 5.97 dB and 82.7% when biased with a 0.5 eV chemical potential [21]. From the literature review, it is validated that graphene exhibits excellent properties in terms of input impedance matching, frequency-configurability, and stable radiation patterns and impedance upon tuning [22].…”

Section: Introductionmentioning

confidence: 80%

The Performance Improvement of THZ Antenna via Modeling and Characterization of Doped Graphene

Gatte¹,

Soh²,

Rahim³

et al. 2016

PIER M

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Abstract-The improvement of Terahertz (THz) antenna requires efficient (nano)materials to operate within the millimeter wave and THz spectrum. In this paper, doped graphene is used to improve the performance of two types of patch antennas, a rectangular and an elliptical antenna. The surface conductivity of conventional (non-doped) graphene is first modeled prior to the design and simulation of the two graphene based antennas in an electromagnetic solver. Next, different graphene models and their corresponding surface conductivities are computed based on different bias voltages or chemical doping. These configurations are then benchmarked against a similar antenna based on conventional metallic (copper) conductor to quantify their levels of performance improvement. The graphene based antennas showed significant improvements for most parameters of antenna than that of the conventional antenna. Besides that, the higher chemical potentials resulting from higher biasing voltages also resulted in this trend. Finally, the elliptical patch graphene antenna indicated better reflection performance, radiation efficiency and gain than a rectangular patch operating at the same resonant frequency.

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“…Therefore, another graphene layer has to play the role of the gate electrode. Utilization of such all-graphene gating and the graphene stacks, structures composed of two or more graphene layers separated by electrically thin dielectrics, has been theoretically investigated and experimentally verified [9,12,[28][29][30]. Alumina, the graphene sheets.…”

Section: Influence Of the Graphene Surface Conductivitymentioning

confidence: 99%

“…In addition to its superior structural, mechanical and electrical properties, its electrically, magnetically and optically controllable conductivity makes it a good choice for the realization of tunable or reconfigurable components and devices. Electromagnetic field interaction with graphene at terahertz frequencies has been successfully investigated for a variety of applications including plasmonic antennas, wave modulators, and terahertz lasers [9][10][11][12][13][14][15]. Possible utilization of this controllable conductivity in the millimeter and submillimeter wave range has yet to be addressed more thoroughly.…”

Section: Introductionmentioning

confidence: 99%

Graphene-based waveguide resonators for submillimeter-wave applications

Ilić

Bukvic

Ilić

et al. 2016

J. Phys. D: Appl. Phys.

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Abstract. Utilization of graphene covered waveguide inserts to form tunable waveguide resonators is theoretically explained and rigorously investigated by means of full-wave numerical electromagnetic simulations. Instead of using graphene based switching elements, the concept we propose incorporates graphene sheets as parts of a resonator. Electrostatic tuning of the graphene surface conductivity leads to changes in the electromagnetic field boundary conditions at the resonator edges and surfaces, thus producing an effect similar to varying electrical length of a resonator. Presented outline of the theoretical background serves to give phenomenological insight into the resonator behavior, but it can also be used to develop customized software tools for design and optimization of graphene based resonators and filters. Due to the linear dependence of the imaginary part of the graphene surface impedance on frequency, the proposed concept was expected to become effective for frequencies above 100 GHz, which is confirmed by the numerical simulations. Frequency range from 100 GHz up to 1100 GHz, where the rectangular waveguides are used, is considered. Simple, all-graphene based resonators are analyzed first, to assess the achievable tunability and to check the performance throughout the considered frequency range. Graphene-metal combined waveguide resonators are proposed in order to preserve excellent quality factors typical for the type of waveguide discontinuities used. Dependence of resonator properties on key design parameters is studied in detail. Dependence of resonator properties throughout the frequency range of interest is studied using eight different waveguide sections appropriate for different frequency intervals. Proposed resonators are aimed at applications in the submillimeter-wave spectral region, serving as the compact tunable components for the design of bandpass filters and other devices.

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Reconfigurable terahertz plasmonic antenna concept using a graphene stack

Cited by 353 publications

References 10 publications

Self-biased reconfigurable graphene stacks for terahertz plasmonics

Self-biased reconfigurable graphene stacks for terahertz plasmonics

The Performance Improvement of THZ Antenna via Modeling and Characterization of Doped Graphene

Graphene-based waveguide resonators for submillimeter-wave applications

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