A Transparent broadband all-dielectric water-based metamaterial absorber based on laser cutting

Li, Lintao; Wen, Jingda; Wang, Yichen; Ye, Jin; Wen, Yongzheng; Sun, Jingbo; Zhao, Qian; Li, Bo; Zhou, Ji

doi:10.1088/1402-4896/accc15

Cited by 16 publications

(5 citation statements)

References 35 publications

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“…designed an all‐medium transparent broadband water‐based metamaterial absorber with absorption >90% and high transmittance in the range of 13.3–40 GHz. [ 21 ] The application of water‐based metasurface absorbers may be greatly hindered by the oxidation, corrosion, or hydrolysis of water in water‐based metasurface absorbers. In 2018, J. Gong first utilized imidazolium‐based ionic liquid [EMIM][N(CN) 2 ] to metasurface absorber for addressing the issue of instability, [ 22 ] which successfully achieved perfect absorption so that it can get an effect of no less than water‐based absorber, even under a thinner thickness.…”

Section: Introductionmentioning

confidence: 99%

Composite Functional Metasurface with Microwave Absorption and Vibrational Energy Harvesting

Yang,

Zhu,

et al. 2024

Adv Materials Technologies

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This paper designs and validates a composite functional metasurface that combines microwave absorption and vibrational energy harvesting. The metasurface is composed of an indium tin oxide (ITO) electrically conductive glass pattern layer, arrays of 1‐ethyl‐3‐methylimidazolium dicyanamide [EMIM][N(CN)2] droplets, and an underlying indium tin oxide (ITO) electrically conductive glass layer. The composite functional metasurface possesses broadband absorption performance when the microwave frequency bands are between 7.34 and 22.63 GHz, which can transform vibration energy into electrical energy simultaneously. The relationship between output power, the number of droplets, internal resistance, and the matching load of the composite functional metasurface is deeply studied. It is found that the internal resistance decreases with the increase in the number of droplet arrays. The effective output power reaches up to 125nW when there are 48 droplet arrays. This technology has promising applications in the field of intelligent and portable electromagnetic devices.

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Section: Introductionmentioning

confidence: 99%

Composite Functional Metasurface with Microwave Absorption and Vibrational Energy Harvesting

Yang,

Zhu,

et al. 2024

Adv Materials Technologies

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“…Recently, an optically transparent broadband water-based absorber was proposed. It can achieve over 70% light transmittance through the use of high-transparency laser-cutting polymethyl methacrylate (PMMA) and saline water [29]. In a different study [30], researchers were able to achieve tunable absorption bands ranging from 7.2 GHz to 100 GHz by controlling the saline content and concentration.…”

Section: Introductionmentioning

confidence: 99%

Low-profile reconfigurable saline water-based ultrawideband metamaterial absorber

Xue,

Liu,

Cong

et al. 2024

J. Phys. D: Appl. Phys.

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Saline water solutions are widely used in the design of electromagnetic absorbers due to their high dielectric loss. However, most of the saline water solution-based absorbers are not reconfigurable. In this work, we propose a low-profile, reconfigurable saline water-based ultra-wideband metamaterial absorber. Two types of dielectric resonators, pyramid-shaped and cube-shaped cavities, are filled with saline water to create multi-frequency resonances and realize ultra-wideband absorption. We fabricate an absorber sample with 3D-printing technology and conduct experiments. It is demonstrated that the absorber exhibits an absorptivity of over 90% for electromagnetic waves within 6.7~63GHz, with a relative bandwidth of 161.5%. The absorption performance remains stable under different incident angles of different polarizations, and the absorber can maintain a high absorbing capacity at different temperatures. Emptying the saline water causes complete reflection of all electromagnetic waves from 1GHz to 53GHz. Furthermore, the infrared radiation of the absorber can be effectively controlled at a low level by introducing cryogenic saline water. This saline-based reconfigurable absorber can find potential applications in electromagnetic camouflage and protection in military scenarios.

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“…Metamaterials, are artificially designed arrays of unit cells that possess electromagnetic properties not found in natural materials [11][12][13][14], and have novel applications in manipulating EM waves [15][16][17][18][19][20]. Metamaterials have emerged in the microwave, terahertz, and even optical bands that give a novel way to design polarization converters.…”

Section: Introductionmentioning

confidence: 99%

Reflection-type transparent metamaterial polarization rotator with ultra-wide bandwidth

Li,

Wen,

Wang

et al. 2023

J. Phys. D: Appl. Phys.

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Polarization is the most fundamental property of electromagnetic waves and the key to control its propagation, while conventional methods can only achieve polarization conversion in narrowband and lack of optical transparency. In this paper, we design an ultra-broadband transparent polarization converter consisting of a surface-etched ITO-PET resonator, a laser-cut PMMA layer,and an ITO-PET substrate bonded together. The structure simulation can achieve the co-polarization reflection coefficient less than -10dB in 13.1-32.3GHz. Then, we analyze the conversion mechanism from electric field, magnetic field, and surface current distribution. Moreover, the actual test performance achieves polarization conversion over 90% at 11.5-25.2 GHz with wide-angle incidence performance and visible light transmittance up to 53%. The excellent performance of this structure provides a new idea for the future design of ultra-broadband transparent polarization converters and expands the application of polarization converters in optical fields such as RF.

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A Transparent broadband all-dielectric water-based metamaterial absorber based on laser cutting

Cited by 16 publications

References 35 publications

Composite Functional Metasurface with Microwave Absorption and Vibrational Energy Harvesting

Composite Functional Metasurface with Microwave Absorption and Vibrational Energy Harvesting

Low-profile reconfigurable saline water-based ultrawideband metamaterial absorber

Reflection-type transparent metamaterial polarization rotator with ultra-wide bandwidth

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