Tunable Graphene-Based Plasmon-Induced Transparency Based on Edge Mode in the Mid-Infrared Region

Xu, Heng; Zhang, Zhaojian; Shang-wu, Wang; Liu, Yun; Zhang, Jingjing; Chen, Dingbo; Ouyang, Jian‐Ming; Yang, Junbo

doi:10.3390/nano9030448

Cited by 11 publications

(2 citation statements)

References 43 publications

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“…On the other hand, it should be kept in mind that various devices feature optimized designs exploiting curved surfaces. As a consequence, an extremely fine mesh is required for the staircase approximation of such configurations [21][22][23], which degrades the simulation's performance. Alternatively, frequency-domain numerical solvers can be employed [24][25][26][27], sacrificing the advantages of time-domain solutions.…”

Section: Introductionmentioning

confidence: 99%

Accurate Time-Domain Modeling of Arbitrarily Shaped Graphene Layers Utilizing Unstructured Triangular Grids

Amanatiadis

Zygiridis

Kantartzis

2022

Axioms

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The accurate modeling of curved graphene layers for time-domain electromagnetic simulations is discussed in the present work. Initially, the advanced properties of graphene are presented, focusing on the propagation of strongly confined surface plasmon polariton waves at the far-infrared regime. Then, the implementation of an unstructured triangular grid was examined, based on the Delaunay triangulation method. The electric-field components were placed at the edges of the triangles, while two different techniques were proposed for the sampling of the magnetic ones. Specifically, the first one suggests that the magnetic component is placed at the triangle’s circumcenter providing more accurate results, although instability may occur for nonacute triangles. On the other hand, the magnetic field was sampled at the triangle’s centroid, considering the second technique, ensuring the algorithm’s stability, but further approximations were required, leading to a slight accuracy reduction. Moreover, the updating equations in the time-domain were extracted via an appropriate approximation of Maxwell equations in their integral form. Finally, graphene was introduced in the computational domain as an equivalent surface current density, whose location matches the corresponding electric components. The validity of our methodology was successfully performed via the comparison of graphene surface wave propagation properties to their theoretical values, whereas the global error determination indicates the minimal triangle dimensions. Additionally, an instructive setup comprising a circular graphene scatterer was analyzed thoroughly, to reveal our technique’s advantages compared to the conventional staircase discretization.

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Section: Introductionmentioning

confidence: 99%

Accurate Time-Domain Modeling of Arbitrarily Shaped Graphene Layers Utilizing Unstructured Triangular Grids

Amanatiadis

Zygiridis

Kantartzis

2022

Axioms

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show abstract

“…For the reason, metamaterials have attracted tremendous attention of physicists, material scientists, chemists and engineers over the past few years [2,3]. As the twodimensional equivalents or counterparts of metamaterials, metasurfaces are widely used to tune the propagation properties of electromagnetic wave, such as polarization, transmission, and reflection by properly engineering the shape and the spatial arrangement of the constituent subwavelength building blocks [4][5][6][7]. In the field of the manipulation of electromagnetic properties, impressive and tremendous optical functionalities have been achieved with metasurfaces, such as frequency filters, sensors, antennas, polarization selectors, and perfect absorbers [5,8].…”

mentioning

confidence: 99%

Broadband near-unity light absorption with anti-hermitian coupled stacked graphene metasurfaces

Yang¹,

Hu²,

Huang³

et al. 2020

Phys. Scr.

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Enhancement of the interaction between monolayer or few-layers graphene and light is crucial to the potential applications of graphene-based optoelectronic devices. Recently, various nanostructured graphene has been proposed to achieve efficient optical absorption, whereas the bandwidth of the enhanced spectral absorption is always fairly narrow, which might be disadvantageous to their opt-electrical applications relying on light harvesting. In this work, we propose an effective method of constructing a stacked graphene-based metasurface to achieve broadband unity absorption. The main concept of the design is to realize the near-zero mutual coupling among graphene resonators based on the idea of anti-Hermitian coupling. This coupling will restrain the mode splitting due to the effect of direct near-field coupling between the neighboring graphene resonators, and thus facilitate the realization of a broadband absorption through the superposition of the individual resonance. In principle, the absorption bandwidth could be expanded further, and the proposed idea might also be used to design broadband absorber of other sub-wavelength nano-resonators.

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Facile preparation strategy of photochromic dual-mode authentication nanofibers by solution blowing spinning of cellulose nanowhiskers-supported polyacrylonitrile

et al. 2022

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Tunable Graphene-Based Plasmon-Induced Transparency Based on Edge Mode in the Mid-Infrared Region

Cited by 11 publications

References 43 publications

Accurate Time-Domain Modeling of Arbitrarily Shaped Graphene Layers Utilizing Unstructured Triangular Grids

Accurate Time-Domain Modeling of Arbitrarily Shaped Graphene Layers Utilizing Unstructured Triangular Grids

Broadband near-unity light absorption with anti-hermitian coupled stacked graphene metasurfaces

Facile preparation strategy of photochromic dual-mode authentication nanofibers by solution blowing spinning of cellulose nanowhiskers-supported polyacrylonitrile

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