Transparent Microwave Absorber Based on Patterned Graphene: Design, Measurement, and Enhancement

Yi, Da; Wei, Xiaoting; Xu, Yi-Li

doi:10.1109/tnano.2017.2688415

Cited by 57 publications

(37 citation statements)

References 20 publications

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“…As shown in Figure 3b, for the 5-unit stacked absorber, approximately 90% absorption can be achieved for 125-165 GHz, which indicates the practical millimeter wave absorber has a 28% fractional absorption bandwidth with the added benefit of optical transparency. Two years later, four kinds of transparent absorbers with above 80% optical transmittivity were proposed in [24,25] by Wei et al The earliest proposed absorber by this group, exhibited in Figure 4a, is composed of monolayer graphene, glass and fluorine-doped tin oxide (FTO) glass as absorbing layer, substrate and reflector layer respectively to form a Salisbury absorber [24]. The measurement results indicate that the absorber can absorb 95% incident power at 14.5 GHz.…”

Section: Absorbers Based On Cvd-grown Graphenementioning

confidence: 99%

“…The measurement results indicate that the absorber can absorb 95% incident power at 14.5 GHz. As shown in Figure 4b, a novel absorber, with the graphene layer patterned with periodic patches to obtain a capacitive and resistive surface, has been presented in [25] subsequently. This absorber possesses the peak absorption coefficient of 0.9 at 12.6 GHz.…”

Section: Absorbers Based On Cvd-grown Graphenementioning

confidence: 99%

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A review of microwave devices based on CVD-grown graphene with experimental demonstration

Chen

Liu

2019

EPJ Appl. Metamat.

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As a two-dimension planar material with zero-gap structure, graphene has a lot of outstanding properties in microwave frequency band, and the chemical vapor deposition (CVD) method can produce the large-scale graphene sheets with high quality for applications. Thus, the study about the microwave devices based on CVD-grown graphene has been aroused wide interests in the past few years. In this paper, mainly concentrating on the research by Chinese scientific groups, we review the development of microwave devices based on the CVD-grown graphene which are all validated by experiments, including attenuators, absorbers, antennas, electromagnetic interference (EMI) shielding and beam reconfiguration.

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Section: Absorbers Based On Cvd-grown Graphenementioning

confidence: 99%

Section: Absorbers Based On Cvd-grown Graphenementioning

confidence: 99%

A review of microwave devices based on CVD-grown graphene with experimental demonstration

Chen

Liu

2019

EPJ Appl. Metamat.

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“…In recent years, a large number of graphene-based absorbers have been discussed in [7]- [12]. A transparent graphene absorber with 28% fractional bandwidth at 140GHz has been experimentally demonstrated in [7].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Graphene periodic resistive patterns called frequency selective surfaces are applied to absorber [9].In[10] and [11], by changing chemical potentials, the absorption energy of transparent graphene broadband absorber is controlled over a relatively large interval in the frequency band. A transparent absorber based on patterned graphene film is theoretically illustrated, practically fabricated and experimentally demonstrated [12].In this paper, a novel, thin and graphene-based absorber is designed by placing Jerusalem-shaped graphene patch between dielectric layers. Graphene's tunability and frequency-independent surface impedance in microwave band is utilized for broadband matching and high absorption.…”

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confidence: 99%

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A Novel Tunable Broadband Absorber based on Graphene

Liu

Yuan

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract--A tunable wideband absorber is presented in this paper. It is based on periodic resistive patterned graphene operating in microwave regime. The proposed absorber not only has wide absorption band but also can be tuned by changing the conductivity of graphene. At chemical potential of 0.3 eV, 90% absorption can be achieved from 10.2GHz to 43.5GHz with 124% fractional bandwidth. Furthermore, the absorber shows relatively stable performance with respect to the incident angle of plane waves. IntroductionElectromagnetic absorbers have been of great interest over the last decades. The main aim of such absorbers is to reduce the unwanted reflections significantly in certain frequency range. Since the classical Salisbury screen[1] and Jaumann absorber[2] are introduced, there have been numerous absorbing structures put forward [3][4]. However, these absorbers have shortcomings of narrow bands and heavy thickness. In order to improve the performance of absorbers, periodic resistive patterns called frequency selective surfaces(FSSs)are applied to absorbers [5]. Without the limitation of one quarterwavelength thickness, it can achieve a wideband in terms of 90% absorption. However, the aforementioned absorbers remain fixed structures, which makes bandwidth invariant. The solution to achieve a tunable absorber is to combine pin diodes or new materials such as graphene into the FSS structure.Graphene has appealed a great attention in absorbing owing to its excellent and unique electrical, optical and mechanical properties, since it is first acquired by using micromechanical cleavage by Geim and Novoselov in 2004[6]. In recent years, a large number of graphene-based absorbers have been discussed in [7]-[12]. A transparent graphene absorber with 28% fractional bandwidth at 140GHz has been experimentally demonstrated in [7]. In[8], graphene-based high impedance surface is proposed as an absorbing structure at microwave frequencies. Graphene periodic resistive patterns called frequency selective surfaces are applied to absorber [9].In[10] and [11], by changing chemical potentials, the absorption energy of transparent graphene broadband absorber is controlled over a relatively large interval in the frequency band. A transparent absorber based on patterned graphene film is theoretically illustrated, practically fabricated and experimentally demonstrated [12].In this paper, a novel, thin and graphene-based absorber is designed by placing Jerusalem-shaped graphene patch between dielectric layers. Graphene's tunability and frequency-independent surface impedance in microwave band is utilized for broadband matching and high absorption. Consequently, the proposed absorber can obtain wideband characteristic and be tunable. Moreover, the absorption stays large when the incident angle is smaller than 60°. The design and performance of the absorber will be discussed in details in the following parts.

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Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

Wang,

Qin,

Duan

et al. 2024

Adv Funct Materials

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The emergence of metamaterials and their continued prosperity have built a powerful working platform for accurately manipulating the behavior of electromagnetic waves, providing sufficient possibility for the realization of metamaterial absorbers with outstanding performance. However, metamaterial absorbers composed of metallic materials typically possess many unfavorable factors, such as non‐adjustable absorption, easy oxidation, low‐melting, and expensive preparation costs. The selection of dielectric materials provides excellent alternatives due to their remarkable properties, thus dielectric‐based metamaterial absorbers (DBMAs) have attracted much attention. To promote breakthroughs in DBMAs and guide their future development, this work systematically and deeply reviews the recent research progress of DBMAs from four different but progressive aspects, including physical principles; classifications, material selections and tunable properties; preparation technologies; and functional applications. Five different types of theories and related physical mechanisms, such as Mie resonance, guided‐mode resonance, and Anapole resonance, are briefly outlined to explain DBMAs having near‐perfect absorption performance. Mainstream material selections, structure designs, and different types of tunable DBMAs are highlighted. Several widely utilized preparation methods for customizing DBMAs are given. Various practical applications of DBMAs in sensing, stealth technology, solar energy absorption, and electromagnetic interference suppression are reviewed. Finally, some key challenges and feasible solutions for DBMAs’ future development are provided.

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Transparent Microwave Absorber Based on Patterned Graphene: Design, Measurement, and Enhancement

Cited by 57 publications

References 20 publications

A review of microwave devices based on CVD-grown graphene with experimental demonstration

A review of microwave devices based on CVD-grown graphene with experimental demonstration

A Novel Tunable Broadband Absorber based on Graphene

Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

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