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Nanomaterials 2018, 8(8), 577; https://doi.org/10.3390/nano8080577

Reconfigurable THz Plasmonic Antenna Based on Few-Layer Graphene with High Radiation Efficiency

1
School of Electrical and Computer Engineering, University of Tehran, Tehran 14174, Iran
2
Department of Electrical Engineering, Yazd University, Yazd 89158, Iran
3
Chair of Electronic Devices, RWTH Aachen University, 52074 Aachen, Germany
4
AMO GmbH, 52074 Aachen, Germany
5
Department of Electrical Engineering and Computer Science, University of Siegen, 57068 Siegen, Germany
6
NaNoNetworking Center in Catalonia (N3Cat), Universitat Politècnica de Catalunya, 08034 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Received: 8 July 2018 / Revised: 24 July 2018 / Accepted: 26 July 2018 / Published: 28 July 2018
Full-Text   |   PDF [1142 KB, uploaded 28 July 2018]   |  

Abstract

Graphene plasmonic antennas possess two significant features that render them appealing for short-range wireless communications, notably, inherent tunability and miniaturization due to the unique frequency dispersion of graphene and its support for surface plasmon waves in the terahertz band. In this letter, dipole-like antennas using few-layer graphene are proposed to achieve a better trade-off between miniaturization and radiation efficiency than current monolayer graphene antennas. The characteristics of few-layer graphene antennas are evaluated and then compared with those of antennas based on monolayer graphene and graphene stacks, which could also provide such improvements. To this end, first, the propagation properties of one-dimensional and two-dimensional plasmonic waveguides based on the aforementioned graphene structures are obtained by transfer matrix theory and finite-element simulation, respectively. Second, the antennas are investigated as three-dimensional structures using a full-wave solver. Results show that the highest radiation efficiency among the compared designs is achieved with the few-layer graphene, while the highest miniaturization is obtained with the even mode of the graphene stack antenna. View Full-Text
Keywords: graphene; plasmonics; terahertz band; tunable antenna; few-layer graphene; graphene stack graphene; plasmonics; terahertz band; tunable antenna; few-layer graphene; graphene stack
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Hosseininejad, S.E.; Neshat, M.; Faraji-Dana, R.; Lemme, M.; Haring Bolívar, P.; Cabellos-Aparicio, A.; Alarcón, E.; Abadal, S. Reconfigurable THz Plasmonic Antenna Based on Few-Layer Graphene with High Radiation Efficiency. Nanomaterials 2018, 8, 577.

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