FDTD Modeling for the Accurate Electromagnetic Wave Analysis of Graphene

Kim, Yeon Hwa; Choi, Heeseon; Cho, Jeahoon; Jung, Kim Mi

doi:10.1007/s42835-020-00390-0

Cited by 8 publications

(2 citation statements)

References 26 publications

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“…Although both intra-band and inter-band contributions must be taken into account to describe the conductivity of graphene, in this study, we focus only on the interaction of low-frequency electromagnetic waves with graphene. Up to about the far-infrared (far-IR), the intra-band conductivity primarily accounts for low EM wave frequencies [17,18]. The simplified expression for the intra-band conductivity, 𝜎 𝑖𝑛𝑡𝑟𝑎 , in graphene can be given as:…”

Section: Methodsmentioning

confidence: 99%

Initial Finite-Difference Time-Domain (FDTD) Modeling of Graphene Based on Intra-band Surface Conductivity

Tola,

Wardhani,

Islamiyah

2023

J. Phys.: Conf. Ser.

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Graphene is a single two-dimensional layer of carbon atoms arranged in a hexagonal lattice, possesses interesting optical properties, and has potential for applications in optical devices. Graphene exhibits tunable surface conductivity, which arises from its electronic band structure. Graphene surface conductivity is determined by its chemical potential, which can be controlled by bias voltage and/or chemical doping. The tunability of surface conductivity allowed to tailored optical properties of graphene, making it a controllable material for optoelectronic applications. Graphene surface conductivity is applied to update the field values at each time step in the Finite-Difference Time-Domain (FDTD) method, enabling us to visualize electromagnetic (EM) wave propagation in graphene. The current article serves as a starting point for developing the FDTD approach to simulate EM wave interactions with graphene, particularly at low frequencies. In this study, we use the Kubo formula for low EM wave frequency (10-105 GHz) at ambient temperature to calculate the intra-band surface conductivity of graphene. The outcome shows that the imaginer’s intra-band surface conductivity value is relatively considerable compared to the actual value at frequencies between 102 and 104. Moreover, the chemical potential exhibits a positive linear relationship with the imaginer intra-band surface conductivity and the intra-band conductivity falls to zero as the frequency rises to NIR.

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Section: Methodsmentioning

confidence: 99%

Initial Finite-Difference Time-Domain (FDTD) Modeling of Graphene Based on Intra-band Surface Conductivity

Tola,

Wardhani,

Islamiyah

2023

J. Phys.: Conf. Ser.

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“…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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Perfectly Matched Layer Formulation of the INBC-FDTD Algorithm for Electromagnetic Analysis of Thin Film Materials

Jang

Jung

2021

IEEE Access

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FDTD Modeling for the Accurate Electromagnetic Wave Analysis of Graphene

Cited by 8 publications

References 26 publications

Initial Finite-Difference Time-Domain (FDTD) Modeling of Graphene Based on Intra-band Surface Conductivity

Initial Finite-Difference Time-Domain (FDTD) Modeling of Graphene Based on Intra-band Surface Conductivity

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

Perfectly Matched Layer Formulation of the INBC-FDTD Algorithm for Electromagnetic Analysis of Thin Film Materials

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