A simple FDTD approach for the analysis and design of graphene based optical devices

“…Instead of surface conductivity defined in Eq. ( 3), the volumetric conductivity of a thin graphene layer with thickness h can be evaluated by the following expression as in [18][19][20][21][22]:…”

Section: Electronic Model Of Graphene Sheetmentioning

confidence: 99%

Efficient ADE-TLM Scheme for Modeling Drude Based Graphene in Terahertz Spectrum

Moumou,

El Adraoui,

Mounirh

et al. 2023

PIER Letters

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In this work, a novel time domain Transmission Line Matrix (TLM) algorithm with Symmetrical Condensed Node (SCN) is developed to model electromagnetic (EM) wave propagation through a single graphene layer in Terahertz (THz) spectrum. The intraband conductivity of graphene (assumed to follow the Drude model) is implemented in TLM method by using the Auxiliary Differential Equation (ADE) of conduction current density. The validity and stability of the obtained results demonstrate the effectiveness and precision of this new modeling technique named ADE-(SCN)TLM, and prove that this method is a powerful tool that can be used to model and simulate complex devices based on graphene sheet for terahertz applications (e.g., Electronics, optoelectronic, etc.)

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“…kT + 2ln e − µc kT + 1 was introduced [21]. Here, it should be noted that, for the numerical algorithms, we use the relation…”

Section: Mathematical Models For the Electrical Conductivity Of Singlmentioning

confidence: 99%

“…1−iωτ and the effective thickness ∆ g . For the realization of the 2D finite difference time domain (FDTD) method, the permittivity of graphene is represented in the following form [21]: The wave vector of SPP propagating along a single graphene sheet can be written as follows…”

Section: Mathematical Models For the Electrical Conductivity Of Singlmentioning

confidence: 99%

All-Plasmonic Switching Effect in the Graphene Nanostructures Containing Quantum Emitters

et al. 2020

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Nonlinear plasmonic effects in perspective 2D materials containing low-dimensional quantum emitters can be a basis of a novel technological platform for the fabrication of fast all-plasmonic triggers, transistors, and sensors. This article considers the conditions for achieving a strong coupling between the surface plasmon–polariton (SPP) and quantum emitter taking into account the modification of local density of optical states in graphene waveguide. In the condition of strong coupling, nonlinear interaction between two SPP modes propagating along the graphene waveguide integrated with a stub nanoresonator loaded with core–shell semiconductor nanowires (NWs) was investigated. Using the 2D full-wave electromagnetic simulation, we studied the different transmittance regimes of the stub with NW for both the strong pump SPP and weak signal SPP tuned to interband and intraband transition in NW, respectively. We solved the practical problem of parameters optimization of graphene waveguide and semiconductor nanostructures and found such a regime of NW–SPP interaction that corresponds to the destructive interference with the signal SPP transmittance through the stub less than 7 % in the case for pump SPP to be turned off. In contrast, the turning on the pump SPP leads to a transition to constructive interference in the stub and enhancement of signal SPP transmittance to 93 % . In our model, the effect of plasmonic switching occurs with a rate of 50 GHz at wavelength 8 µ m for signal SPP localized inside 20 nm graphene stub loaded with core–shell InAs/ZnS NW.

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A simple FDTD approach for the analysis and design of graphene based optical devices

Cited by 14 publications

References 30 publications

Nonlinear plasmonic switching in graphene-based stub nanoresonator loaded with core-shell nanowire

Nonlinear plasmonic switching in graphene-based stub nanoresonator loaded with core-shell nanowire

Efficient ADE-TLM Scheme for Modeling Drude Based Graphene in Terahertz Spectrum

All-Plasmonic Switching Effect in the Graphene Nanostructures Containing Quantum Emitters

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