Tunable and transparent broadband metamaterial absorber with water-based substrate for optical window applications

Zhang, Yaqiang; Dong, Hongxing; Mou, Nanli; Li, Haonan; Yao, Xin; Zhang, Long

doi:10.1039/d0nr08640a

Cited by 50 publications

(32 citation statements)

References 52 publications

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“…In addition to the change in inherent properties, the thickness of dielectric spacer can also be adjusted to design MAs with tunable absorption because of the enhanced near-field coupling between the periodic patterns and metallic ground with lower distance. [225] Zhang et al proposed a mechanically stretchable MA. [226] By applying a strain along H field direction, the resonant frequency was dynamically moved from 11.15 to 11.56 GHz.…”

Section: Tailoring Thicknessmentioning

confidence: 99%

“…Instead of using air as tunable element, Zhang et al proposed a tunable MA utilizing water substrate. [225] By adjusting the thickness of the water layer from 0 to 1.2 mm via two syringes, the absorption was tuned from narrow band to broad band in the frequency range of 5.8-16.2 GHz. Note that all aforementioned MAs are operating at microwave range, which are relatively easy in fabrication due to the centimeter size.…”

Section: Tailoring Thicknessmentioning

confidence: 99%

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Metamaterial Absorbers: From Tunable Surface to Structural Transformation

et al. 2022

Advanced Materials

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Since the first demonstration, remarkable progress has been made in the theoretical analysis, structural design, numerical simulation, and potential applications of metamaterial absorbers (MAs). With the continuous advancement of novel materials and creative designs, the absorption of MAs is significantly improved over a wide frequency spectrum from microwaves to the optical regime. Further, the integration of active elements into the MA design allows the dynamical manipulation of electromagnetic waves, opening a new platform to push breakthroughs in metadevices. In the last several years, numerous efforts have been devoted to exploring innovative approaches for incorporating tunability to MAs, which is highly desirable because of the progressively increasing demand on designing versatile metadevices. Here, a comprehensive and systematical overview of active MAs with adaptive and on‐demand manner is presented, highlighting innovative materials and unique strategies to precisely control the electromagnetic response. In addition to the mainstream method by manipulating periodic patterns, two additional approaches, including tailoring dielectric spacer and transforming overall structure are called back. Following this, key parameters, such as operating frequency, relative tuning range, and switching speed are summarized and compared to guide for optimum design. Finally, potential opportunities in the development of active MAs are discussed.

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Section: Tailoring Thicknessmentioning

confidence: 99%

Section: Tailoring Thicknessmentioning

confidence: 99%

Metamaterial Absorbers: From Tunable Surface to Structural Transformation

et al. 2022

Advanced Materials

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“…32 Zhang et al demonstrated an actively tunable MMA with a water-based substrate, polymethyl methacrylate (PMMA), distilled water and ITO lms, achieving absorbance over 90% within 5.8-16.2 GHz, and 70.18% optical transmittance. 33 Other design schemes, including multilayer transparent resistive lm and aluminum wire grids, which has great advantages in working bandwidth, but the multilayer structure inevitably reduces the overall transmittance of the absorber. 26,34,35 The absorption bandwidth of aluminum wire grids transparent absorber is limited for its operating bandwidth strongly depends on the structure of the composite resonance.…”

Section: Introductionmentioning

confidence: 99%

Ultra-thin optically transparent broadband microwave metamaterial absorber based on indium tin oxide

Xiong

Fu²,

Cheng³

et al. 2022

Optical Materials

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“…A metamaterial terahertz biosensor, which has two resonant absorption frequencies, was represented by Li [18] for fast and label-free identification of early-stage cervical cancerous tissues. Seeking for the low-frequency band gap, metamaterials with different microstructure were designed and presented by Zhang [19] and Lin [20], respectively. In these works, it could be noted that the nonlinear factors were not taken into consideration.…”

Section: Introductionmentioning

confidence: 99%

Analytical analysis of nonlinear internal resonance bandgap of pendulum-type metamaterial

Guo

Chen

Zhang

2022

Int. J. Mod. Phys. B

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In this paper, a pendulum-type metamaterial (PTM) is designed with a pendulum bob hinged at the primary mass. Considering the effect of geometric nonlinearity, the nonlinear dynamic equations of PTM unit cell are presented with the aid of the Bloch theorem. The analytical formula of dispersion equation is deduced to discuss the nonlinear internal resonance bandgap using the harmonic balance method. The obtained bandgap of the metamaterial is in good agreement with the numerical simulation result. The nonlinear geometric influence of pendulum on PTM bandwidth is significant. The bandgaps under different internal resonances are substantially different from each other due to the nonlinear effects. The upper boundaries of the frequency bandgap under 1:1/2 and 1:1/3 internal resonance rise nonlinearly to higher than those under linear and 1:1 internal resonance conditions. It shows that the impact of 1:1/2 and 1:1/3 internal resonance on the bandgap could be more obvious as the strong nonlinearity is taken into consideration.

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Tunable and transparent broadband metamaterial absorber with water-based substrate for optical window applications

Abstract: A tunable and transparent metamaterial absorber (MMA) with a water-based substrate is presented, with high optical transparency and broadband microwave absorptivity. In the material structure, indium–tin–oxide (ITO) films are included...

Cited by 50 publications

References 52 publications

Metamaterial Absorbers: From Tunable Surface to Structural Transformation

Metamaterial Absorbers: From Tunable Surface to Structural Transformation

Ultra-thin optically transparent broadband microwave metamaterial absorber based on indium tin oxide

Analytical analysis of nonlinear internal resonance bandgap of pendulum-type metamaterial

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