Independently tunable bifunctional terahertz metasurface based on double-layer graphene

Wang, Yuxin; Yang, Rongcao; Zhao, Yijia; Li, Zhaohua; Zhang, Wenmei; Tian, Jinping

doi:10.1016/j.optmat.2022.112793

Cited by 21 publications

(2 citation statements)

References 48 publications

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“…When combined with metamaterials, this layer can control the amplitude (up to 47%) and phase (32.2°) of the transmitted wave at a frequency of 0.86 THz. Motivated by the aforementioned study, numerous other graphene metamaterial structures have been proposed to perform different functionalities in the THz frequency range, [53][54][55] including amplitude modulators, [56] polarization controllers, [57][58][59] and phase modulators. [60] As shown in Figure 10, A. D. Squires et al proposed a duallayer metamaterial structure in which the entire device pattern is overlaid onto 2D materials, graphene, and gold.…”

Section: D Materialsmentioning

confidence: 99%

A Review: Active Tunable Terahertz Metamaterials

Li,

Chen,

Yan

et al. 2024

Advanced Photonics Research

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The diversity and practicability of terahertz metamaterials have experienced rapid development in the past decade due to the increasing demand for various devices. This topic has attracted significant interest from researchers. Among the key functional devices in terahertz metamaterial systems, the active control ability of terahertz metamaterials is highly valuable and captivating. This implies that the electromagnetic properties of metamaterials can be modulated over a wide dynamic range by external stimuli. This review categorizes the different types of tunable terahertz metamaterials based on the external stimuli to which they respond, namely, mechanical modulation, electrical modulation, magnetic modulation, and optical modulation. Mechanically modulated devices offer simple yet efficient modulation, while electrical and magnetic modulation provide effective active modulation through electrical mechanisms. Optical modulation, in contrast, focuses on incorporating various materials to achieve active modulation.

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Section: D Materialsmentioning

confidence: 99%

A Review: Active Tunable Terahertz Metamaterials

Li,

Chen,

Yan

et al. 2024

Advanced Photonics Research

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“…Among these materials, graphene attracts more attention, because its electron mobility and Fermi level can be tuned by manipulating the external electrostatic field [23] , magnetic field [24] , optical pump [25] , and temperature, thus leading to excellent tunability. Substantial studies on graphene-based single-band [29] , dual-band [26,30] , multi-band [28,31,32] , and broadband [33,34] tunable perfect absorbers have been performed in the past decade. For example, Sun et al [26] proposed a graphene-based dual-band independently tunable perfect absorber consisting of double-stacked graphene layers.…”

Section: Introductionmentioning

confidence: 99%

Digital coding THz dynamical multi-band perfect absorber via graphene/diamond metasurface

Wang,

Zhang,

Wen

et al. 2023

Preprint

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The monolayer graphene-based terahertz (THz) perfect absorber has made significant progress in switchable devices with diverse functionalities. However, the prior approaches to achieving switchability rely on either multi-layered metasurface with complex configuration or complicated patterned metasurface. A switchable absorber that uses tunable materials to switch between n-band and m-band modes is also intriguing but has not yet been reported. Here, a dynamically switchable multi-band perfect absorber with a digital coding graphene metasurface is proposed and demonstrated. By integrating multiple metasurface units with different Fermi levels into a newly generated period, we realize a multi-band perfect absorber with a rather simple and straightforward configuration composed of patterned metasurface. Through introducing a digital coding metasurface into the perfect absorber, we successfully use the digital signals from FPGA to convert n-band to m-band absorption modes. Moreover, the results reveal that the THz perfect absorber, possessing a great impedance matching with the free space, has excellent angle tolerance and robustness. Such a perfect absorber offers a flexible tool for selecting THz channels and may pave the way for the 6th generation communication.

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Ultrathin tunable UWB metasurface absorber design by exciting plasmonic modes in bilayer graphene stack

Maurya,

Ghosh

2024

Diamond and Related Materials

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Independently tunable bifunctional terahertz metasurface based on double-layer graphene

Cited by 21 publications

References 48 publications

A Review: Active Tunable Terahertz Metamaterials

A Review: Active Tunable Terahertz Metamaterials

Digital coding THz dynamical multi-band perfect absorber via graphene/diamond metasurface

Ultrathin tunable UWB metasurface absorber design by exciting plasmonic modes in bilayer graphene stack

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