Printable all-dielectric water-based absorber

Bradley, Patrick J.; Munoz, Max; Brennan, Conor; Hao, Yang

doi:10.1038/s41598-018-32395-1

Cited by 16 publications

(15 citation statements)

References 36 publications

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“…To maximize the scattering, the dipole resonance frequencies must overlap, but the fulfillment of the condition a 1 ¼ b 1 remains. Other larger element shapes satisfying Kerker's first condition exhibit greater scattering, but their sizes are also significantly larger [7,[13][14][15]. Using elements composed of both metal and water, it can be shown that the FBR can be enhanced as well as the total scattering efficiency.…”

Section: Configuration and Resultsmentioning

confidence: 99%

“…Both electric and magnetic dipoles can be excited in the sphere, but we pay most of our attention to the latter because it is the dominant mode. MSs with dielectric inclusions satisfying the first Kerker condition are currently of great interest [7,[13][14][15]. We demonstrate that this condition can also be satisfied in a water sphere, and we investigate how it is affected by the water losses.…”

Section: Introductionmentioning

confidence: 93%

“…We find water of particular interest because it holds the potential to be the fundamental element in cheap and bio-friendly microwave MS wave transformers (such as transmitarrays and reflectarrays), MS absorbers, and dielectric resonator antennas, to mention a few. Several water-based devices have already been demonstrated; see, e.g., [2][3][4][5][6][7][8]. The dynamic properties of water's permittivity-along with its liquid stateoffer multiple tuning parameters.…”

Section: Introductionmentioning

confidence: 99%

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Mie Resonances in Water Spheres for Microwave Metamaterials and Antennas

Jacobsen

Arslanagić

Laurynenka

2020

RSL

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All-dielectric metamaterials rely on high-permittivity inclusions, which support Mie resonances. At microwave frequencies, distilled water exhibits a relatively high permittivity with tunable dynamic properties that are interesting for microwave devices, although absorption in water reduces their efficiency. In this paper, we investigate the scattering and absorption of single water spheres of various sizes and temperatures. The study is based on analytical calculations of Mie resonances. We also investigate the balanced electric/magnetic dipole excitation for more directive scattering in the forward direction. Finally, we discuss the major differences and similarities between water spheres and water cylinders. The results can be used as guidelines for metamaterial-based components as well as for dielectric resonator antenna designs.

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Section: Configuration and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Mie Resonances in Water Spheres for Microwave Metamaterials and Antennas

Jacobsen

Arslanagić

Laurynenka

2020

RSL

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“…74) Other types of WB inclusions have been investigated including cylinders, 73 a water-metal hybrid structure, 79 and even more complex shapes. 47,59 Their fundamental electromagnetic properties display various performance characteristics providing a variety of options for the designing of WB devices composed of resonators.…”

Section: A Mie Resonances In Single Water Inclusionsmentioning

confidence: 99%

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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“…Recent researches demonstrate that metastructures possess uncommon properties in effectively improving the electromagnetic wave absorbing and shielding performance. [101][102][103][104][105][106][107][108][109][110] Metastructures with a complex 3D structure combine material loss and structural loss, which greatly improves the microwave absorbing properties. And thus, it is feasible to apply metastructures in numerous fields such as antenna technologies, radar, EMI shielding materials, and electromagnetic wave absorption materials.…”

Section: Introductionmentioning

confidence: 99%