Enhanced broadband absorption with a twisted multilayer metal–dielectric stacking metamaterial

Deng, Guangsheng; Sun, Huiming; Lv, Kun; Yang, Jun; Yin, Zhiping; Liu, Ying; Chi, Baihong

doi:10.1039/d1na00372k

Cited by 11 publications

(4 citation statements)

References 37 publications

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“…In addition, the comparison of the MWAP and large-angle MWAP of this work and similar pyramid MWAP is shown in Table ,,− , It can be found that the pyramid has excellent wide bandwidth microwave absorbing ability, which is a promising candidate for broadband and high-efficiency microwave absorber application.…”

Section: Resultsmentioning

confidence: 85%

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Broadband and High-Efficiency Microwave Absorbers Based on Pyramid Structure

Sun

Zhang²,

et al. 2022

ACS Appl. Mater. Interfaces

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Microwave-absorbing materials with wide bandwidth and high absorptivity are increasingly playing an important role in overthe-air (OTA) testing. In this work, a kind of pyramid absorbing material was prepared using flame-retardant absorbers as the filler. In addition, a coating was used to further improve the flame-retardant properties of the microwave-absorbing material. To obtain excellent microwave absorption performance (MWAP), a high-frequency structure simulator (HFSS) was adopted to design structural materials. Here, the total height, the base height, the decapitation height of the pyramid tip, the distance between the pyramids, and other parameters were analyzed; then, the actual processing and molding were realized. The MWAP of −30 dB was achieved at 2.7−18 GHz, and the MWAP of −10 dB was also met at 2−18 GHz. In particular, the study also investigated the MWAP of large angle, which can meet the MWAP of −10 dB at 2−18 GHz and MWAP of −30 dB at 4−18 GHz. Most importantly, the absorption mechanism of the pyramid structure was explored. The influence of the tip was proved by the distribution of the electromagnetic field in the pyramid. It can be regarded as a multilayer microwave-absorbing material due to the impedance gradient of the pyramid, which can provide an effective research idea and method for future engineering applications.

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Section: Resultsmentioning

confidence: 85%

“…The obtained absorbers achieved the microwave absorption performance (MWAP) of −40 dB above 18 GHz and could be extended to 45°. Deng et al designed a twisted multilayer metal dielectric tower-shaped microwave-absorbing material, achieving broadband absorption of more than 80% at 11.3–35 GHz. Sun et al .…”

Section: Introductionmentioning

confidence: 99%

Broadband and High-Efficiency Microwave Absorbers Based on Pyramid Structure

Sun

Zhang²,

et al. 2022

ACS Appl. Mater. Interfaces

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“…Metamaterial absorbers [15][16][17], in particular, have attracted a great deal of attention due to their perfect wave absorption, which can be utilized for radar stealth as well as other functions. To achieve ultra-broadband radar absorption, it can be achieved by metamaterial absorber by combining multilayer structures [18][19][20], water [21][22][23], loading [24], resistive films [25], and so on. To achieve infrared stealth, frequency selective surface (FSS) with high metal fill rate can be used.…”

Section: Introductionmentioning

confidence: 99%

An optically transparent flexible metasurface absorber with broadband radar absorption and low infrared emissivity

Jing¹,

Wei²,

Kang³

et al. 2023

J. Phys. D: Appl. Phys.

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The rapid development of surveillance technology has driven the research of multispectral stealth. Demand for infrared and microwave radar compatible stealth is becoming increasingly urgent in military applications. Herein, a versatile metamaterial absorber is designed and fabricated to simultaneously achieve ultra-broadband radar scattering reduction, low infrared emission, and high optical transparency. The designed structure consists of an infrared stealth layer, radar absorption layers, and backing ground. The infrared stealth layer employs specifically indium tin oxide (ITO) square patches, while the radar absorption layers can be obtained by stacking different size ITO patterned films of the same structure with high surface resistances, realizing broadband microwave stealth performance in the 1.98 to 18.6 GHz frequency range with an incident angle of 45º. The broad radar stealth and low infrared emissivity of 0.283 are consistent with the simulations and calculations. Furthermore, the designed structure exhibits characteristics such as polarization insensitivity, wide incident angles, optical transparency, and flexibility, allowing for a wide range of applications in various environments.

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“…Therefore, broadband MMAs with high-efficient absorption in continuous bands are increasingly favored. During the design of broadband MMAs, some precious metals such as Au and Ag are commonly used as resonators of choice [31][32][33][34][35][36]. For instance, a solar-absorber based on a square Au resonator was reported, which could achieve 78% average absorption in the 300-500 THz range [31].…”

Section: Introductionmentioning

confidence: 99%

Thermally tunable vanadium-dioxide-based broadband metamaterial absorber with switchable functionality in the terahertz band

Duan

et al. 2023

Funct. Compos. Struct.

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In this paper, a thermally tunable broadband metamaterial absorber, with switchable functionality in the terahertz band, consisted of periodically arranged vanadium dioxide (VO2) and a gold film separated by a layer of polyimide is reported, which is capable of switching from absorber to reflector through the phase change property of VO2. When VO2 is in the metallic state, three near-perfect absorption peaks localized at 3.48 THz, 5.09 THz and 7.05 THz are obtained, and the combination of them gives rise to a broadband absorption, more than 90% of absolute absorption bandwidth reaches 4.35 THz (3.1-7.45 THz) with a relative absorption bandwidth of 82.46%. When VO2 is in the dielectric state, it can switch from near-perfect broadband absorption to near-perfect reflection with the maximum intensity modulation of 92.4%. The broadband absorption is insensitive to polarization of incident beam due to symmetrical structure design and exhibits excellent tolerance for large oblique incidence angle. In addition, size changes of patterned VO2 array structure provides a large impact on the absorption performance of the thermally tunable device, especially the absorption bandwidth. Our proposed device is expected to have outstanding prospects in terahertz thermal imaging, communications, and temperature-controlled metasurface.

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Enhanced broadband absorption with a twisted multilayer metal–dielectric stacking metamaterial

Abstract: This paper proposes and experimentally demonstrates the enhanced broadband absorption with twisted multilayer metal-dielectric stacking. Compared with the traditional metal-dielectric pyramid, the resonance frequencies of the third-order magnetic resonances in...

Cited by 11 publications

References 37 publications

Broadband and High-Efficiency Microwave Absorbers Based on Pyramid Structure

Broadband and High-Efficiency Microwave Absorbers Based on Pyramid Structure

An optically transparent flexible metasurface absorber with broadband radar absorption and low infrared emissivity

Thermally tunable vanadium-dioxide-based broadband metamaterial absorber with switchable functionality in the terahertz band

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