Plasmonic Properties of Graphene Loaded Waveguide Bounded by Chiroferrite Medium

IF 3.3 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2024-09-09 DOI:10.1007/s11468-024-02523-x

M. Shaban, Zahraa J. Mohammed, Hussein H. AbdulGhani, Soror Ali Mahdi, Hasan Majdi, N. M. A. Hadia, Laiba, A. Waleed

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Abstract

Herein, plasmonic characteristics of graphene filled waveguide surrounded by chiroferrite medium are analyzed in the THz frequency spectrum. Graphene conductivity is modelled using the Kobo formula, and impedance boundary conditions are employed to compute dispersion relation. The influence of constitutive variables of chiroferrite medium on the propagation behavior of SPP mode is examined. The propagation behavior of SPPs mode is studied by changing the constitutive parameters of chiroferrite medium and graphene features. From numerical results, it is revealed that effective mode index (EMI, phase velocity, graphene conductivity, and EM wave frequency) can be tailored by adjusting chirality, gyrotropy, and graphene features (chemical potential, number of graphene layers) in the THz frequency range. This work may have potential applications in plasmonic community to design the innovative optical sensors, plasmonic platforms, detectors, and surface waveguides in the THz frequency region and provide active control due to additional degree of freedom in graphene and anisotropy of chiral medium.

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以铁氧体介质为边界的石墨烯负载波导的等离子特性

本文分析了太赫兹频谱中被铁氧体介质包围的石墨烯填充波导的等离子特性。石墨烯的导电性使用 Kobo 公式建模，并采用阻抗边界条件计算色散关系。研究了铁氧体介质的构成变量对 SPP 模式传播行为的影响。通过改变铁氧体介质和石墨烯特征的构成参数，研究了 SPPs 模式的传播行为。数值结果表明，在太赫兹频率范围内，可以通过调整手性、陀螺度和石墨烯特征（化学势、石墨烯层数）来定制有效模式指数（EMI、相位速度、石墨烯电导率和电磁波频率）。由于石墨烯的额外自由度和手性介质的各向异性，这项工作可能会在太赫兹频率区域的创新光学传感器、等离子体平台、探测器和表面波导的设计中得到潜在应用，并提供主动控制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

期刊介绍： Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.