Expression of Concern: On the effect of width of metallic armchair graphene nanoribbons in plasmonic waveguide applications

Smaili, Sami; Singal, Vikas; Massoud, Yehia

doi:10.1109/nems.2012.6196853

Cited by 5 publications

(2 citation statements)

References 86 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The majority of existing studies [58,68,47,29] are focused on infinitely large graphene sheets. Only recently in [128], the dielectric function of GNRs is utilized to investigate SPP waves in metallic AGNRs. Next, we capture the impact of the finite width of AGNRs and the chemical potential on the SPP waves.…”

Section: Analytical Studymentioning

confidence: 99%

Fundamentals of Electromagnetic Nanonetworks in the Terahertz Band

Jornet

2012

FNT in Networking

View full text Add to dashboard Cite

Nanotechnology is providing a new set of tools to the engineering community to design nanoscale components with unprecedented functionalities. The integration of several nano-components into a single entity will enable the development of advanced nanomachines. Nanonetworks, i.e., networks of nanomachines, will enable a plethora of applications in the biomedical, environmental, industrial and military fields. To date, it is still not clear how nanomachines will communicate. The miniaturization of a classical antenna to meet the size requirements of nanomachines would impose the use of very high radiation frequencies. The available transmission bandwidth increases with the antenna resonant frequency, but so does the propagation loss. Due to the expectedly very limited power of nanomachines, the feasibility of nanonetworks would be compromised if this approach were followed. Therefore, a new wireless technology is needed to enable this paradigm.The objective of this thesis is to establish the foundations of graphene-enabled electromagnetic communication in nanonetworks. First, novel graphene-based plasmonic nanoantennas are proposed, modeled and analyzed. The obtained results point to the Terahertz Band (0.1-10 THz) as the frequency range of operation of novel nano-antennas. For this, the second contribution in this thesis is the development of a novel channel model for Terahertz Band communication. In addition, the channel capacity of the Terahertz Band is numerically investigated to highlight the potential of this still-unregulated frequency band. Third, a novel modulation based on the transmission of femtosecond-long pulses is proposed and its performance is analyzed.Fourth, the use of low-weight codes to prevent channel errors in nanonetworks is proposed and investigated. Fifth, a novel symbol detection scheme at the receiver is developed to support the proposed modulation scheme. Sixth, a new energy model for self-powered nanomachines with piezoelectric nano-generators is developed. Moreover, a new Medium Access Control protocol tailored to the Terahertz Band is developed. Finally, a one-to-one nano-link is emulated to validate the proposed solutions. v

show abstract

Section: Analytical Studymentioning

confidence: 99%

Fundamentals of Electromagnetic Nanonetworks in the Terahertz Band

Jornet

2012

FNT in Networking

View full text Add to dashboard Cite

show abstract

“…The nanoscale thickness and planar footprints of metasurfaces enable their fabrication using single-step lithography technologies and allow them to take full advantage of mature semiconductor industries. So far, the research community has demonstrated numerous high-performance metasurfaces exhibiting a chain of functionalities including beam shaping [26], high-resolution imaging [27][28][29], metaabsorbers [30][31][32][33], asymmetric light transmission [34][35][36][37], hologram projection [38][39][40][41][42][43][44], and structured light generation [45][46][47][48][49][50][51][52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Perfect Vortex Beams Generation Based on All-Dielectric Metasurface for Ultraviolet Light

et al. 2022

View full text Add to dashboard Cite

Featuring shorter wavelengths and high photon energy, ultraviolet (UV) light enables many exciting applications including photolithography, sensing, high-resolution imaging, and optical communication. The conventional methods of UV light manipulation through bulky optical components limit their integration in fast-growing on-chip systems. The advent of metasurfaces promised unprecedented control of electromagnetic waves from microwaves to visible spectrums. However, the availability of suitable and lossless dielectric material for the UV domain hindered the realization of highly efficient UV metasurfaces. Here, a bandgap-engineered silicon nitride (Si3N4) material is used as a best-suited candidate for all-dielectric highly efficient UV metasurfaces. To demonstrate the wavefront manipulation capability of the Si3N4 for the UV spectrum, we design and numerically simulate multiple all-dielectric metasurfaces for the perfect vortex beam generation by combing multiple phase profiles into a single device. For different numerical apertures (NA =0.3 and 0.7), it is concluded that the diffracted light from the metasurfaces with different topological charges results in an annular intensity profile with the same ring radius. It is believed that the presented Si3N4 materials and proposed design methodology for PV beam-generating metasurfaces will be applicable in various integrated optical and nanophotonic applications such as information processing, high-resolution spectroscopy, and on-chip optical communication.

show abstract