Unifying approach to multilayer metamaterials absorber for bandwidth enhancement

Dinh, Minh Q.; Le, Minh Thuy; Ngo, Son Tung; Tùng, Nguyễn Thanh

doi:10.1016/j.optcom.2020.126725

Cited by 7 publications

(7 citation statements)

References 33 publications

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“…[294][295][296][297][298][299][300][301][302][303][304][305] Finally, we also briefly summarize the current emerging construction methods for low-cost broadband absorption, such as the all-dielectric design method, [318][319][320][321][322][323][324][325][326][327][328][329][330] and unpatterned method. [331][332][333][334][335][336][337] A comprehensive summary of the design strategies of BMAs is necessary for readers to intuitively understand how to construct BMAs and provide helpful guidance for the sustainable prosperity and in-depth research of BMAs.…”

Section: Coupled Mode Theorymentioning

confidence: 99%

“…In addition to the known use of self-assembly techniques to avoid the use of lithography for low-cost device fabrication, the researchers have experimentally demonstrated that the use of unpatterned (or pattern-free) designs is as well as an effective way to achieve broadband absorption responses without the need for lithography to build patterned resonators, and is one of the potential ways to design BMAs. [331][332][333][334][335][336][337] The major features of these unpatterned, completely planarized BMAs are that the metal layer and dielectric layer are alternately stacked without any patterned layers, which could lead to the development of "bidirectional absorbers" without masks and low precision requirements. [331,332] Based on this, Wang et al proposed and analyzed a bidirectional MA with broadband and narrowband absorption.…”

Section: Pattern-free (Or Unpatterned) Design Strategy For Broadband ...mentioning

confidence: 99%

“…Compared with bidirectional MAs, such a multi-layer stacked unpatterned design approach is more of a unified method used to enhance the absorption bandwidth of MAs, [333] which means that it is more widely used for normalized unidirectional absorbers. A BMA based on the fully planarized design of ultrathin metal films provides an almost uniform absorption over a wide spectrum.…”

Section: Pattern-free (Or Unpatterned) Design Strategy For Broadband ...mentioning

confidence: 99%

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Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

Wang

Duan

et al. 2023

Adv Funct Materials

111

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Metamaterial absorbers have been widely studied and continuously concerned owing to their excellent resonance features of ultra-thin thickness, light-weight, and high absorbance. Their applications, however, are typically restricted by the intrinsic dispersion of materials and strong resonant features of patterned arrays (mainly referring to narrow absorption bandwidth). It is, therefore essential to reassert the principles of building broadband metamaterial absorbers (BMAs). Herein, the research progress of BMAs from principles, design strategies, tunable properties to functional applications are comprehensively and deeply summarized. Physical principles behind broadband absorption are briefly discussed, typical design strategies in realizing broadband absorption are further emphasized, such as top-down lithography, bottom-up self-assembly, and emerging 3D printing technology. Diversified active components choices, including optical response, temperature response, electrical response, magnetic response, mechanical response, and multi-parameter responses, are reviewed in achieving dynamically tuned broadband absorption. Following this, the achievements of various interdisciplinary applications for BMAs in energy-harvesting, photodetectors, radar-IR dual stealth, bolometers, noise absorbing, imaging, and fabric wearable are summarized. Finally, the challenges and perspectives for future development of BMAs are discussed.

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Section: Coupled Mode Theorymentioning

confidence: 99%

Section: Pattern-free (Or Unpatterned) Design Strategy For Broadband ...mentioning

confidence: 99%

Section: Pattern-free (Or Unpatterned) Design Strategy For Broadband ...mentioning

confidence: 99%

See 1 more Smart Citation

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

Wang

Duan

et al. 2023

Adv Funct Materials

111

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show abstract

“…2(b). It is notable that although the field and current strengths vary along the length of the resonator, the equivalent circuit model has still been widely applied due to its accuracy and simplicity [13], [14]. Normally, the near-field electric fields are not just located between the resonator and the ground but parts of them "flow" from one cell to the next one.…”

Section: Metamaterials Harvester Unit Cell Design a Metamaterials Absorber Unit Cell Designmentioning

confidence: 99%

Dual-Polarized Wide-Angle Energy Harvester for Self-Powered IoT Devices

et al. 2021

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In this work, a dual-polarized wide-angle energy harvester operating at 3.75 GHz is proposed for ambient RF energy harvesting applications. A 4x4 array harvester can efficiently harvest incident RF waves from all polarizations, resulting in high RF-AC efficiency of 94% and final RF-DC efficiency of 34% at 0.02 W/m 2 input power density, or -15 dBm input power. This performance is preserved under a wide incident angle up to 65 degrees in TE mode and 75 degrees in TM mode. Owning to its simple power combining configuration, the array can be easily expanded to incorporate more unit cells that increases the amount of power collected. Not only having the RF-DC conversion function, it is also equipped with a power management circuit to create a usable output voltage level. With this advantage, the harvester is suitable to be employed in real-life applications in which the polarization and angle of incidence are unknown and the incident power is very low.INDEX TERMS Dual-polarization, self-powered IoT device, metamaterial absorber, rectennas, RF energy harvesting.

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“…The cross-shaped MTM structure can be approximated as two orthogonal rectangular resonators, corresponding to vertical and horizontal polarization. The operating principle of metal/dielectric/metal MTM absorbers has been reported in [17,18] using equivalent circuit model. In general, when an incident wave arrives at the structure, external magnetic field induces an anti-parallel current running on the crossshaped resonator and the ground plane.…”

Section: Mtm Absorber Designmentioning

confidence: 99%

Design, fabrication, and characterization of an electromagnetic harvester using polarization-insensitive metamaterial absorbers

Dinh¹,

Hoang²,

Vu³

et al. 2021

J. Phys. D: Appl. Phys.

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Increasing interest has been paid to metamaterial (MTM) absorbers owing to their huge potential in energy harvesting. However, only a few existing absorbers have the ability to harvest energy from arbitrarily polarized waves without assigning diodes to each unit cell, limiting their applicability and lowering the overall efficiency. In this work, we present an electromagnetic (EM) harvester based on MTM absorbers with the capability of doing so. The harvester consists of periodically arranged symmetrical MTM unit cells and two distinct power combiner networks, allowing it to efficiently harvest the power of incident EM waves with random polarization. With an absorption reaching 99%, the absorber possesses the EM-to-alternating current efficiencies of 75% and 78% corresponding to the vertical and horizontal polarization, respectively, while the final EM-to-direct current conversion efficiency can reach up to 55% at an incident power density of 350 mW m−2. The MTM absorber can also be upgraded to incorporate more unit cells, forming a larger structure with an increasing amount of power harvested.

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Unifying approach to multilayer metamaterials absorber for bandwidth enhancement

Cited by 7 publications

References 33 publications

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

Dual-Polarized Wide-Angle Energy Harvester for Self-Powered IoT Devices

Design, fabrication, and characterization of an electromagnetic harvester using polarization-insensitive metamaterial absorbers

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