Triple-Band Anisotropic Perfect Absorbers Based on α-Phase MoO3 Metamaterials in Visible Frequencies

Anisotropic materials provide a new platform for building diverse polarization-dependent optical devices. Two-dimensional α-phase molybdenum trioxides (α-MoO3), as newly emerging natural van der Waals materials, have attracted significant attention due to their unique anisotropy. In this work, we theoretically propose an anisotropic perfect metamaterial absorber in visible frequencies, the unit cell of which consists of a multi-layered α-MoO3 nanoribbon/dielectric structure stacked on a silver substrate. Additionally, the number of perfect absorption bands is closely related to the α-MoO3 nanoribbon/dielectric layers. When the proposed absorber is composed of three α-MoO3 nanoribbon/dielectric layers, electromagnetic simulations show that triple-band perfect absorption can be achieved for polarization along [100], and [001] in the direction of, α-MoO3, respectively. Moreover, the calculation results obtained by the finite-difference time-domain (FDTD) method are consistent with the effective impedance of the designed absorber. The physical mechanism of multi-band perfect absorption can be attributed to resonant grating modes and the interference effect of Fabry–Pérot cavity modes. In addition, the absorption spectra of the proposed structure, as a function of wavelength and the related geometrical parameters, have been calculated and analyzed in detail. Our proposed absorber may have potential applications in spectral imaging, photo-detectors, sensors, etc.

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A Tunable Triple-Band Near-Infrared Metamaterial Absorber Based on Au Nano-Cuboids Array

Nanomaterials ◽

10.3390/nano10020207 ◽

2020 ◽

Vol 10 (2) ◽

pp. 207 ◽

Cited By ~ 47

Author(s):

Feng Qin ◽

Zeqiang Chen ◽

Xifang Chen ◽

Zao Yi ◽

Weitang Yao ◽

...

Keyword(s):

Surface Plasmons ◽

Near Infrared ◽

Structural Parameters ◽

Fdtd Method ◽

Field Enhancement ◽

Metamaterial Absorber ◽

Infrared Band ◽

Perfect Absorption ◽

Tunable Metamaterial ◽

Triple Band

In this article, we present a design for a triple-band tunable metamaterial absorber with an Au nano-cuboids array, and undertake numerical research about its optical properties and local electromagnetic field enhancement. The proposed structure is investigated by the finite-difference time domain (FDTD) method, and we find that it has triple-band tunable perfect absorption peaks in the near infrared band (1000–2500 nm). We investigate some of structure parameters that influence the fields of surface plasmons (SP) resonances of the nano array structure. By adjusting the relevant structural parameters, we can accomplish the regulation of the surface plasmons resonance (SPR) peaks. In addition, the triple-band resonant wavelength of the absorber has good operational angle-polarization-tolerance. We believe that the excellent properties of our designed absorber have promising applications in plasma-enhanced photovoltaic, optical absorption switching and infrared modulator optical communication.

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Design of Dual-Band Terahertz Perfect Metamaterial Absorber Based on Circuit Theory

Molecules ◽

10.3390/molecules25184104 ◽

2020 ◽

Vol 25 (18) ◽

pp. 4104

Author(s):

Zhongmin Liu ◽

Liang Guo ◽

Qingmao Zhang

Keyword(s):

Chemical Potential ◽

Metamaterial Absorber ◽

Circuit Model ◽

Field Analysis ◽

Dual Band ◽

Geometrical Parameters ◽

Absorption Bands ◽

Perfect Absorption ◽

Wide Range ◽

Novel Strategy

We present a novel strategy for designing a dual-band absorber based on graphene metasurface for terahertz frequencies. The absorber consists of a two-dimensional array of patches deposited on a metal-backed dielectric layer. Using an analytical circuit model, we obtain closed-form relatinos for the geometrical parameters of the absorber and the properties of the applied materials to achieve the dual-band absorber. Two absorption bands with perfect absorption at the preset frequencies of 0.5 and 1.5 THz are achieved. The results obtained by the analytical circuit model are compared to the simulations carried out by full-wave electromagnetic field analysis. The agreement between results is very good. We demonstrate that the graphene absorber remains as the dual band for a wide range of the chemical potential. Furthermore, the recommended dual band absorber is insensitive in terms of polarization and remain within various incident angles.

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Research on Perfect and Tunable Metamaterial Absorber Based on Crosshair-shaped Graphene

Journal of Physics Conference Series ◽

10.1088/1742-6596/2109/1/012015 ◽

2021 ◽

Vol 2109 (1) ◽

pp. 012015

Author(s):

Yiran Guo ◽

Yunping Qi ◽

Chuqin Liu ◽

Weiming Liu ◽

Xiangxian Wang

Keyword(s):

Relaxation Time ◽

Chemical Potential ◽

Incident Angle ◽

Fdtd Method ◽

Reference Value ◽

Metamaterial Absorber ◽

Selective Absorption ◽

Perfect Absorber ◽

Wide Angle ◽

Perfect Absorption

Abstract Graphene, as a new nano-material, according to the physical properties of electric field localization and selective absorption on light of surface plasmon resonance (SPR), a tunable, multi-band and wide-angle perfect absorber based on crosshair-shaped graphene is devised by using the Finite Difference in Time Domain (FDTD) method. In this paper, the effects of chemical potential, relaxation time, and incident angle of light on the absorptivity of graphene are systematically discussed. The simulation experiment shows that there are two absorption peaks with perfect absorption rate appeared in the study range, and the maximum modulation index can be obtained by changing the relaxation time. Finally, it proves that the absorber is insensitive to wide-angle of light. Thus, it is able to be concluded that the absorber has a great reference value to sensor, wireless communication, biomedical and other fields.

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Theoretical Investigation of a Simple Design of Triple-Band Terahertz Metamaterial Absorber for High-Q Sensing

Applied Sciences ◽

10.3390/app9071410 ◽

2019 ◽

Vol 9 (7) ◽

pp. 1410 ◽

Cited By ~ 1

Author(s):

Tao Chen ◽

Runyu Zhao ◽

Ben-Xin Wang

Keyword(s):

Refractive Index ◽

Narrow Band ◽

Metamaterial Absorber ◽

Resonance Absorption ◽

Simple Design ◽

Perfect Absorption ◽

High Q ◽

Au Film ◽

Resonance Modes ◽

Triple Band

This paper presents a simple metamaterial design to achieve the triple-band near-perfect absorption response that can be used in the area of sensor application. The introduced absorber consists of an array of Au strip and a bulk flat Au film separated by an insulator dielectric layer. Three narrow-band resonance absorption peaks are obtained by superposing three different modes (a fundamental mode resonance and two high-order responses) of the Au strip. These resonance modes (in particular of the last two modes) have large sensitivity to the changes of the surrounding index, overlayer thickness and the refractive index of the overlayer.

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Two-layered Dual-band Perfect Metamaterial Absorber at K band Frequency

Advanced Electromagnetics ◽

10.7716/aem.v7i2.547 ◽

2018 ◽

Vol 7 (2) ◽

pp. 25-27

Author(s):

M. C. Tran ◽

T. T. H. Phuong

Keyword(s):

Metamaterial Absorber ◽

Dual Band ◽

Material Structure ◽

Perfect Absorption ◽

Band Frequency ◽

Absorption Frequency ◽

Dielectric Layers ◽

Absorber Structure ◽

Perfect Metamaterial Absorber ◽

K Band

This paper presents a study of a novel absorber structure based on two-dielectric-layers, two perfect absorption frequency bands at K band (f1 = 26.5 GHz and f2 = 28.6 GHz) go under observance. The study of the dependence of absorption and frequency on relative distance between the layers of material and the material structure parameters are discussed.

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Design and analysis of an ultra-thin polarization-insensitive wide-angle triple-band metamaterial absorber for X-band application

Optical and Quantum Electronics ◽

10.1007/s11082-021-02760-y ◽

2021 ◽

Vol 53 (3) ◽

Author(s):

Shijun Ji ◽

Zhiyou Luo ◽

Ji Zhao ◽

Handa Dai ◽

Chengxin Jiang

Keyword(s):

Metamaterial Absorber ◽

Wide Angle ◽

X Band ◽

Polarization Insensitive ◽

Triple Band

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Independently Tunable Multipurpose Absorber with Single Layer of Metal-Graphene Metamaterials

Materials ◽

10.3390/ma14020284 ◽

2021 ◽

Vol 14 (2) ◽

pp. 284

Author(s):

Chen Han ◽

Renbin Zhong ◽

Zekun Liang ◽

Long Yang ◽

Zheng Fang ◽

...

Keyword(s):

Energy Harvesting ◽

Fermi Level ◽

Potential Application ◽

Single Layer ◽

Wide Band ◽

Metamaterial Absorber ◽

Unit Cell ◽

Perfect Absorption ◽

Solar Energy Harvesting ◽

Band Absorption

This paper reports an independently tunable graphene-based metamaterial absorber (GMA) designed by etching two cascaded resonators with dissimilar sizes in the unit cell. Two perfect absorption peaks were obtained at 6.94 and 10.68 μm with simple single-layer metal-graphene metamaterials; the peaks show absorption values higher than 99%. The mechanism of absorption was analyzed theoretically. The independent tunability of the metamaterial absorber (MA) was realized by varying the Fermi level of graphene under a set of resonators. Furthermore, multi-band and wide-band absorption were observed by the proposed structure upon increasing the number of resonators and resizing them in the unit cell. The obtained results demonstrate the multipurpose performance of this type of absorber and indicate its potential application in diverse applications, such as solar energy harvesting and thermal absorbing.

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Theoretical design of a triple-band perfect metamaterial absorber based on graphene with wide-angle insensitivity

Results in Physics ◽

10.1016/j.rinp.2021.104037 ◽

2021 ◽

Vol 23 ◽

pp. 104037

Author(s):

Miao Pan ◽

Huazhu Huang ◽

Baodian Fan ◽

Wenzhi Chen ◽

Shuai Li ◽

...

Keyword(s):

Metamaterial Absorber ◽

Wide Angle ◽

Theoretical Design ◽

Perfect Metamaterial Absorber ◽

Triple Band

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Effective Application of Magnetic Material Based on Metamaterial Absorber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.907 ◽

2013 ◽

Vol 774-776 ◽

pp. 907-912

Author(s):

Hui Bin Zhang ◽

Li Wei Deng ◽

Nan Zhang ◽

Pei Heng Zhou ◽

Jian Liang Xie ◽

...

Keyword(s):

Magnetic Material ◽

Design Method ◽

Copper Wire ◽

Wire Array ◽

Magnetic Loss ◽

Peak Position ◽

Metamaterial Absorber ◽

Absorption Peak ◽

Perfect Absorption ◽

Effective Application

We simulate, fabricate and measure a microwave absorber by introducing metamaterial design method to magnetic material. The proposed absorber is composed of periodic copper wire array, magnetic material coated on copper wires, a foam substrate and a bottom metal plane. The results show a nearly perfect absorption peak around 8.7GHz (simulated) and 7.6GHz (measured). Even though the electric and magnetic field distribution indicate that the absorption is a typical metamaterial absorption, the power loss is neither Ohmic nor dielectric loss but magnetic loss, which is different from typical metamaterial absorber. The skillful introduction of the magnetic loss improves the absorption performance, including the absorption bandwidth and intensity. The designed absorber shows an effective application of the magnetic material, which is only 1/60000 volume proportion of the total absorber. Dependences of the absorption on frequency and the coating volume of the magnetic material manifest that the coated magnetic material can adjust the absorption peak position and intensity. The absorber can be an attractive candidate of electromagnetic wave absorber.

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