All-Dielectric Transparent Metamaterial Absorber With Encapsulated Water

Wang, Qingmin; Bi, Ke; Lim, Sungjoon

doi:10.1109/access.2020.3026358

Cited by 18 publications

(7 citation statements)

References 43 publications

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“…Simulation results show minimal dependence on changes in water permittivity due to temperature shifts, and thus, the MS can be employed under various conditions as long as the water does not freeze or boils. Furthermore, the absorption efficiency is above 80% for TE (TM) waves with incidence angles below 45 (60 ).…”

Section: B Resonances In Simple Metasurfaces For Wave Controlmentioning

confidence: 97%

“…As noted previously, water also introduces additional advantages besides those provided by its high permittivity. Some of the WB MS absorbers feature visual transparency, 43,44,60,70 which opens for the possibility of windows for stealth vehicles, vessels, and aircrafts as well as anechoic chambers. WB MSs can also be made flexible as is the case for the MS proposed in Ref.…”

Section: B Resonances In Simple Metasurfaces For Wave Controlmentioning

confidence: 99%

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Water-based devices for advanced control of electromagnetic waves

Jacobsen

Arslanagić

Lavrinenko

2021

Applied Physics Reviews

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Tunable devices are of great interest as they offer reconfigurability to their operation, although many of them employ rare and expensive materials. In a world with increasing focus on ecological compatibility and recyclability, immense efforts are being made to find bio-friendly alternatives. However, in some cases, one does not have to look far, because water, a high-permittivity dielectric at microwave frequencies, is readily available. Recent studies have shown that compact Mie resonators, which are the fundamental blocks in all-dielectric metamaterials and dielectric resonator antennas, can be realized with small water elements. In a variety of applied physics areas, encompassing frequencies from the radio to the optical parts of the spectrum, all-dielectric implementations have received immense attention. When it comes to water, its temperature-dependent permittivity and liquidity enable a multitude of unprecedentedly simple means to reconfigure and tune the resulting devices. Moreover, being a polar solvent, water easily dissolves various physiologically important electrolytes, which potentially can be exploited in a sensor design. Presently, we review water-based devices for advanced microwave control and sensing. We show and discuss the dynamic properties of water and examine the microwave scattering and absorption characteristics of single water elements. We investigate how such water elements can be employed in various microwave designs, including single resonators, metamaterials, metasurfaces, antennas, absorbers, and radio frequency components. The main complications of water are its losses, especially at higher microwave frequencies, and its stability. We discuss how to overcome these and show that even highly loss-sensitive modes, namely, toroidal modes and bound states in the continuum, can be realized with water-based devices. We believe that water-based devices usher the route to meet the UN proclaimed goals on global sustainability and human-friendly environment.

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Section: B Resonances In Simple Metasurfaces For Wave Controlmentioning

confidence: 97%

Section: B Resonances In Simple Metasurfaces For Wave Controlmentioning

confidence: 99%

Water-based devices for advanced control of electromagnetic waves

Jacobsen

Arslanagić

Lavrinenko

2021

Applied Physics Reviews

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“…The comparison between the proposed absorber and some water-based absorbers is shown in Table 2 , which indicates that our absorber has wider bandwidth, bi-directional absorption, transparency and it is all-dielectric. Here, we also list the unit size and operating wavelength of the relevant literature [ 38 , 39 , 40 , 41 , 42 ] to illustrate the breakthrough of the strict requirement of the sub-wavelength through their relationship.…”

Section: Experiments Verificationmentioning

confidence: 99%

“…Wang et al introduced an all-dielectric WB absorber. The absorptance of the MA was over 90% at 10.45–11.20 GHz, and it was equal to a fraction bandwidth of 6.9% [ 41 ]. Lu et al proposed an all-dielectric WB transparent absorptive material.…”

Section: Introductionmentioning

confidence: 99%

Broadband Bi-Directional All-Dielectric Transparent Metamaterial Absorber

et al. 2022

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Water-based absorbers have shown great development potential in the past few years. In this paper, an all-dielectric transparent bi-directional water-based broadband metamaterial absorber is designed. The simulation results indicate that absorptance of the absorber is over 90% in 5.7–41.6 GHz, and its fraction bandwidth is 151.8%. The experimental results are greatly consistent with the simulations. The designed absorber has excellent performances of polarization insensitivity, oblique incidence stability and thermal stability. When the absorptance is more than 0.8, the maximum incident angle reaches 40° in TE mode and is over 60° in TM mode. In 0–80 °C, absorptance of the absorber is hardly changed. Because of the optical transparency of the designed absorber, it can be extensively used in stealth window weapons and electromagnetic compatibility equipment.

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“…The absorptivity can reach more than 90% in 7.74-23.56 GHz, and it has the thermal stability of 0 • C-100 • C and the angular tolerance of 0 • -60 • in oblique incidence. By encapsulating water in polydimethylsiloxane, Wang et al [20] proposed a fully transparent metamaterial water-based absorber with the absorptivity of more than 90% in 10.45-11.20 GHz. However, none of these all-dielectric structures can satisfy the characteristics of ultra-wideband (UWB), transparency, thermal stability and polarization stability at the same time.…”

Section: Introductionmentioning

confidence: 99%

Design of all-dielectric ultra-wideband transparent water-based absorber

Lu¹,

Chen²,

Li³

2021

J. Phys. D: Appl. Phys.

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In this paper, an all-dielectric water-based transparent absorber is proposed. It is composed of transparent resin material filled with water, thus achieving the characteristics of all-dielectric and transparency. The simulation results show that the proposed absorber can achieve the absorptivity of more than 90% in the frequency band of 7.28-28.22GHz, and has good thermal stability and oblique incidence angular stability. The thickness of the absorber is only 6.5mm, corresponding to 0.16λmax~0.61λmin. The test results are in good agreement with the simulation results, which proves that the water-based absorber has good performance. It can be applied in the field of electromagnetic(EM) stealth, EM energy harvesting and EM shielding.

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All-Dielectric Transparent Metamaterial Absorber With Encapsulated Water

Cited by 18 publications

References 43 publications

Water-based devices for advanced control of electromagnetic waves

Water-based devices for advanced control of electromagnetic waves

Broadband Bi-Directional All-Dielectric Transparent Metamaterial Absorber

Design of all-dielectric ultra-wideband transparent water-based absorber

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