Water‐Resonator‐Based Metasurface: An Ultrabroadband and Near‐Unity Absorption

Song, Qinghua; Wu, Zhang; Wu, Pin Chieh; Zhu, Weiming; Shen, Zhongxiang; Chong, Peter Han Joo; Liang, Qing Xuan; Yang, Zhen; Yi, Hao; Cai, Hong; Zhou, Hai Feng; Gu, Yuandong; Lo, G. Q.; Tsai, Din Ping; Bourouina, Tarik; Leprince‐Wang, Yamin; Liu, Ai Qun

doi:10.1002/adom.201601103

Cited by 124 publications

(54 citation statements)

References 43 publications

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“…Although water enjoys the advantage of high real part of permittivity in microwave regime, its imaginary part is also high, which indicates a large absorption to the microwave. Hence, water-cell metamaterials are proposed as perfect absorbers for microwave [122][123][124]. The water can be patterned as droplet array with a metallic reflector at the backside which blocks the transmission of the microwave.…”

Section: Water-cell Metamaterialsmentioning

confidence: 99%

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Metafluidic metamaterial: a review

Song

Zhu

et al. 2018

Advances in Physics: X

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Metafluidic metamaterial is a metamaterial the optical response of which is dependent on fluid contributed metamolecules. The dependence originates either from a fluid background coupling to the metamolecule or from the resonance in a liquid structured metamolecule. Different liquid materials including water, liquid crystal, and liquid metals are applied to realize the metafluidic metamaterial. Sophisticated technologies like electric bias and microfluidic system have been used for active control of metafluidic metamaterials which provide a new platform for electromagnetic wave manipulation and metadevice realization. The liquid background and significant tunability of the metafluidic metamaterial promise numerous applications, such as material sensing, bio-detection, energy harvesting, and imaging, just to name a few.

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Section: Water-cell Metamaterialsmentioning

confidence: 99%

“…The liquid background metamaterial consists metamaterial in water solvent [56], metamaterial in Lc [88] and nanoparticles in liquid [98]. The liquid-cell metamaterial consists of water-cell metamaterial [124] and liquid-metal-cell metamaterial [140].…”

Section: Introductionmentioning

confidence: 99%

Metafluidic metamaterial: a review

Song

Zhu

et al. 2018

Advances in Physics: X

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“…Liquid dielectric antennas have drawn a significant amount of attention for a number of reasons, (1) conformability: any antenna shape can be achieved due to the nature of liquid; (2) reconfigurability (both physical and chemical): it is easy to change the resonance frequency and bandwidth by changing the height/width of the liquid stream and the chemical composition; (3) low cost: liquid dielectrics are cheap and easily available compared to more costly liquid metals (e.g., mercury (Hg) or eutectic gallium indium allow (EGaIn)), (4) transparent and biocompatible, (5) high permittivity which helps to miniaturize antennas. Besides antennas, liquid dielectric materials have been applied in the field of metamaterials and metasurfaces [14][15][16][17], for the design of reconfigurable frequency selective surfaces (FSS) [18], absorbers [19][20][21][22][23], sensors [24], reflect-arrays and array lenses [25], and polarization converters [18]. However, these topics fall beyond the scope of the present review and the details can be found in the review papers [15,26].…”

Section: Introductionmentioning

confidence: 99%

A Review on Reconfigurable Liquid Dielectric Antennas

Motovilova

Huang

2020

Materials

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The advancements in wireless communication impose a growing range of demands on the antennas performance, requiring multiple functionalities to be present in a single device. To satisfy these different application needs within a limited space, reconfigurable antennas are often used which are able to switch between a number of states, providing multiple functions using a single antenna. Electronic switching components, such as PIN diodes, radio-frequency micromechanical systems (RF-MEMS), and varactors, are typically used to achieve antenna reconfiguration. However, some of these approaches have certain limitations, such as narrow bandwidth, complex biasing circuitry, and high activation voltages. In recent years, an alternative approach using liquid dielectric materials for antenna reconfiguration has drawn significant attention. The intrinsic conformability of liquid dielectric materials allows us to realize antennas with desired reconfigurations with different physical constraints while maintaining high radiation efficiency. The purpose of this review is to summarize different approaches proposed in the literature for the liquid dielectric reconfigurable antennas. It facilitates the understanding of the advantages and limitations of this technology, and it helps to draw general design principals for the development of reconfigurable antennas in this category.

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“…In the last two decades, innovative results have been achieved in the field of metamaterials, namely, artificial structures that exhibit electromagnetic, acoustical, and optical properties that are generally not found in nature. From the moment of the first experimental verification of the single negative metamaterials [1,2], the unique properties based on negative permittivity, permeability or index of refraction have found a place in a number of novel devices and applications [3][4][5][6][7][8]. Special attention has been given to double-negative or left-handed (LH) media, which at the same time show negative values of permittivity and permeability in a certain frequency range.…”

Section: Introductionmentioning

confidence: 99%

Microfluidic Sensor Based on Composite Left-Right Handed Transmission Line

et al. 2019

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In this paper, we propose a novel metamaterial-based microfluidic sensor that permits the monitoring of properties of the fluid flowing in the microfluidic reservoir embedded between the composite left–right handed (CLRH) microstrip line and the ground plane. The sensor’s working principle is based on the phase shift measurement of the two signals, the referent one that is guided through conventional microstrip line and measurement signal guided through the CLRH line. At the operating frequency of 1.275 GHz, the CLRH line supports electromagnetic waves with group and phase velocities that are antiparallel, and therefore the phase “advance” occurs in the case of CLRH line, while phase delay arises in the right-handed (RH) frequency band. The change of the fluid’s properties that flow in the microfluidic reservoir causes the change of effective permittivity of the microstrip substrate, and subsequently the phase velocity changes, as well as the phase shift. This effect was used in the design of the microfluidic sensor for the measurement of characteristics of the fluid that flows in the microfluidic reservoir placed under the CLRH line. The complete measurement system was developed including the Wilkinson power divider that splits the signal between conventional RH and CLRH section, transmission lines with the microfluidic reservoirs, and a detection circuit for phase shift measurement. Measurement results for different fluids confirm that the proposed sensor is characterized by relatively high sensitivity and good linearity (R2 = 0.94). In this study, the practical application of the proposed sensor is demonstrated for the biomass estimation inside the microfluidic bioreactors, which are used for the cultivation of MRC-5 fibroblasts.

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Water‐Resonator‐Based Metasurface: An Ultrabroadband and Near‐Unity Absorption

Abstract: Water-resonator-based metasurface : an ultrabroadband and near-unity absorption.

Cited by 124 publications

References 43 publications

Metafluidic metamaterial: a review

Metafluidic metamaterial: a review

A Review on Reconfigurable Liquid Dielectric Antennas

Microfluidic Sensor Based on Composite Left-Right Handed Transmission Line

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