A perfect electrically tunable graphene-based metamaterial absorber

Asl, A. Beheshti; Pourkhalil, D.; Rostami, Ali; Mirtaghioglu, H.

doi:10.1007/s10825-021-01664-0

Cited by 17 publications

(4 citation statements)

References 40 publications

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“…The relationship between carrier density and the conductivity of graphene can be articulated as follows [48]:…”

Section: Structural Design and Methodologymentioning

confidence: 99%

Graphene-Metamaterial Based Tunable Broadband Polarization Insensitive Absorber for Terahertz Antenna Design

Rahad,

Mohsin,

Belal Hossain Bhuian

et al. 2024

IEEE Access

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The advent of graphene has opened new avenues for the design of high-performance metamaterial devices, particularly in the realm of electromagnetic absorption applications. This paper introduces a novel design for a broadband tunable graphene metamaterial absorber (GMMA) utilizing graphene. Through numerical simulations, our proposed GMMA demonstrates a absorption bandwidth of 3 THz (1.14 -4.14 THz) with absorptivity exceeding 90% for both transverse magnetic (TM) and transverse electric (TE) modes. A comprehensive numerical analysis, using a transmission line equivalent circuit model, is conducted to find out the impedance components of all the corresponding layers, which can be significant to determine the impedance matching. The absorber exhibits wideband tunability, polarization insensitivity, and robust tolerance to structural variations, making it a promising candidate for diverse applications in the terahertz (THz) band especially in the antenna regime. Our proposed GMMA antenna can achieve a gain of 37.48 dB, a directivity of 32.81 dB, a return loss of -34 dB, and an efficiency of 99.96%. This research provides a valuable contribution to the development of tunable broadband GMMAs for THz frequencies, addressing the increasing demand for high-speed and efficient devices in the modern era of science and technology.

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“…The relationship between carrier density and the conductivity of graphene can be articulated as follows [48]:…”

Section: Structural Design and Methodologymentioning

confidence: 99%

Graphene-Metamaterial Based Tunable Broadband Polarization Insensitive Absorber for Terahertz Antenna Design

Rahad,

Mohsin,

Belal Hossain Bhuian

et al. 2024

IEEE Access

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“…Nowadays, researchers have proposed some dynamically tunable metamaterial absorbers 18 – 20 The tunable materials mainly include novel 2D materials, such as graphene, 21 – 23 molybdenum disulfide (MoS 2 ), and phase change materials, such as vanadium oxide (VO 2 ) 24 – 26 Also, most common metamaterial absorbers involve metal parts, but the change of electrical performance of the metal at higher frequencies would lead to the performance degradation of the device 27 , 28 .…”

Section: Introductionmentioning

confidence: 99%

Carbon-based ultrabroadband tunable terahertz metasurface absorber

Nie,

He,

Cao

2024

Adv. Photon. Nexus

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.Carbon-based materials, such as graphene and carbon nanotubes, have emerged as a transformative class of building blocks for state-of-the-art metamaterial devices due to their excellent flexibility, light weight, and tunability. In this work, a tunable carbon-based metal-free terahertz (THz) metasurface with ultrabroadband absorption is proposed, composed of alternating graphite and graphene patterns, where the Fermi level of graphene is adjusted by varying the applied voltage bias to achieve the tunable ultrabroadband absorption characteristics. In particular, when the Fermi level of graphene is 1 eV, the absorption coefficient exceeds 90% from 7.24 through 16.23 THz, and importantly, the absorption bandwidth reaches as much as 8.99 THz. In addition, it is polarization-insensitive to incident waves and maintains a high absorption rate at an incident angle of up to 50 deg. This carbon-based device enjoys higher absorption bandwidth, rates, and performance compared to conventional absorbers in the THz regime and can be potentially applied in various fields, including THz wave sensing, modulation, as well as wearable health care devices, and biomedicine detection.

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“…Upender [13] proposes a graphene-based circular ring-shaped metasurface absorber for biosensing applications. Beheshti Asl [14] proposes a multilayered graphene-based construction to increase the absorption bandwidth and level of the metasurface absorber. Yi presented a metasurface absorber in his article.…”

Section: Introductionmentioning

confidence: 99%

A Circular Split Ring Resonator Absorber with Graphene Material for Terahertz Communication Applications

Prasad

Pardhasaradhi

Madhav

et al. 2023

Preprint

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In this research article, we proposed a split ring resonator(SRR) based metasurface absorber based on graphene material. The performance of the graphene-based absorber at terahertz frequencies can be altered by varying the chemical potential of graphene material. Because of its excellent tunability and optical responsiveness at terahertz frequency, graphene-based metamaterials have been widely used in optoelectronic devices, sensors, filters, and many more. The proposed structure contains three layers namely graphene-based patch a conductive layer, lossy silicon as a dielectric layer, and finally gold as a bottom conductive layer. The purpose of this research is to present a thorough investigation of graphene-based THz metamaterial absorbers, including modeling and verification of the structure through an equivalent circuit approach. It is very much beneficial to understand the conductive phenomenon of graphene material by tuning the fermi chemical potential.

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A perfect electrically tunable graphene-based metamaterial absorber

Cited by 17 publications

References 40 publications

Graphene-Metamaterial Based Tunable Broadband Polarization Insensitive Absorber for Terahertz Antenna Design

Graphene-Metamaterial Based Tunable Broadband Polarization Insensitive Absorber for Terahertz Antenna Design

Carbon-based ultrabroadband tunable terahertz metasurface absorber

A Circular Split Ring Resonator Absorber with Graphene Material for Terahertz Communication Applications

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