Journal ArticleDOI
Graphene-based Plasmonic Nano-Antenna for Terahertz Band Communication in Nanonetworks
TLDR
Graphene-based plasmonic nano-antennas are able to operate at much lower frequencies than their metallic counterparts, e.g., the Terahertz Band for a one-micrometer-long ten-nanometers-wide antenna, which has the potential to enable EM communication in nanonetworks.Abstract:
Nanonetworks, i.e., networks of nano-sized devices, are the enabling technology of long-awaited applications in the biological, industrial and military fields. For the time being, the size and power constraints of nano-devices limit the applicability of classical wireless communication in nanonetworks. Alternatively, nanomaterials can be used to enable electromagnetic (EM) communication among nano-devices. In this paper, a novel graphene-based nano-antenna, which exploits the behavior of Surface Plasmon Polariton (SPP) waves in semi-finite size Graphene Nanoribbons (GNRs), is proposed, modeled and analyzed. First, the conductivity of GNRs is analytically and numerically studied by starting from the Kubo formalism to capture the impact of the electron lateral confinement in GNRs. Second, the propagation of SPP waves in GNRs is analytically and numerically investigated, and the SPP wave vector and propagation length are computed. Finally, the nano-antenna is modeled as a resonant plasmonic cavity, and its frequency response is determined. The results show that, by exploiting the high mode compression factor of SPP waves in GNRs, graphene-based plasmonic nano-antennas are able to operate at much lower frequencies than their metallic counterparts, e.g., the Terahertz Band for a one-micrometer-long ten-nanometers-wide antenna. This result has the potential to enable EM communication in nanonetworks.read more
Citations
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Journal ArticleDOI
Full length article: Terahertz band: Next frontier for wireless communications
TL;DR: An in-depth view of Terahertz Band (0.1-10 THz) communication, which is envisioned as a key technology to satisfy the increasing demand for higher speed wireless communication, is provided.
Journal ArticleDOI
6G and Beyond: The Future of Wireless Communications Systems
TL;DR: Significant technological breakthroughs to achieve connectivity goals within 6G include: a network operating at the THz band with much wider spectrum resources, intelligent communication environments that enable a wireless propagation environment with active signal transmission and reception, and pervasive artificial intelligence.
Journal ArticleDOI
Combating the Distance Problem in the Millimeter Wave and Terahertz Frequency Bands
TL;DR: In this article, four directions to tackle the crucial problem of distance limitation are investigated, namely, a distance-aware physical layer design, ultra-massive MIMO communication, reflectarrays, and intelligent surfaces.
Journal ArticleDOI
TeraNets: ultra-broadband communication networks in the terahertz band
TL;DR: The state of the art in THz Band device technologies is surveyed, and a roadmap is defined for the development of THZ Band systems as the new frontier in wireless communications.
Journal ArticleDOI
Femtosecond-Long Pulse-Based Modulation for Terahertz Band Communication in Nanonetworks
TL;DR: A modulation and channel access scheme for nanonetworks in the Terahertz Band is developed based on the transmission of one-hundred-femtosecond-long pulses by following an asymmetric On-Off Keying modulation Spread in Time (TS-OOK).
References
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TL;DR: Owing to its unusual electronic spectrum, graphene has led to the emergence of a new paradigm of 'relativistic' condensed-matter physics, where quantum relativistic phenomena can now be mimicked and tested in table-top experiments.
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Graphene plasmonics for tunable terahertz metamaterials
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Transformation Optics Using Graphene
Ashkan Vakil,Nader Engheta +1 more
TL;DR: By designing and manipulating spatially inhomogeneous, nonuniform conductivity patterns across a flake of graphene, one can have this material as a one-atom-thick platform for infrared metamaterials and transformation optical devices.
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Graphene Plasmonics: A Platform for Strong Light-Matter Interactions
TL;DR: Graphene plasmons have been proposed as a platform for strongly enhanced light-matter interactions in this paper, where the authors predict unprecedented high decay rates of quantum emitters in the proximity of a carbon sheet, observable vacuum Rabi splittings, and extinction cross sections exceeding the geometrical area in graphene nanoribbons and nanodisks.