Impact of resonator geometry and its coupling with ground plane on ultrathin metamaterial perfect absorbers

Huang, Li; Chowdhury, Dibakar Roy; Ramani, Suchitra; Reiten, Matthew T.; Luo, Sheng‐Nian; Azad, Abul K.; Taylor, Antoinette J.; Chen, Hou-Tong

doi:10.1063/1.4749823

Cited by 183 publications

(93 citation statements)

References 22 publications

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“…1, we assume that layer 1 is considered as a surface with zero thickness. S 11 = |S 11 |e jθ 11 is the reflection coefficient of layer 1 from area 1 to area 1, S 21 = |S 21 |e jθ 21 is the transmission coefficient of layer 1 from area 1 to area 2, S 12 = |S 12 |e jθ 12 is the transmission coefficient of layer 1 from area 2 to area 1, and S 22 = |S 22 |e jθ 22 is the reflection coefficient of layer 1 from area 2 to area 2. According to the interference theory 23 and due to the …”

Section: Extended Interference Theory Modelmentioning

confidence: 99%

“…Even though the interference theory, or multiple reflection theory, is not a new theory and has been studied in EM wave, 17 Microwave Engineering, 18 optics 19 and a kind of absorbance body named Salisbury Screen, 20 of which the configuration is similar with MMA, it still has some differences, namely the interference theory exhibits advantage for studying the MMA through quite-correct quantitative analysis. Until now, however, only normal incidence condition was analyzed for MMAs in previous literatures 16,21,22 and little attention paid on the oblique incidence conditions.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of metamaterial absorber in normal and oblique incidence by using interference theory

et al. 2013

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Metamaterial absorber (MMA), which is a kind of thin electromagnetic absorber consisting of sub-wavelength metamaterial resonators and can exhibit near-perfect absorption characteristics, has been widely investigated in recently years. The impedance matching theory was proposed to analyze the configuration of MMA in most literatures. Such theory, however, may not suitable to analyze the interactions of metamaterial resonators and the ground plane. The interference theory, on another hand, can play effective approach for this kind of problem presented in recent studies, whereas little attention has been paid on the oblique incidence conditions. In this paper, we firstly extend the interference theory model to make it applicable for oblique incident waves and analyze MMA using the extended interference theory model. Secondly, we further explore the sufficient condition for the maximum absorptivity at both normal and oblique incidence cases. Thirdly, with the sufficient condition, we can obtain the absorbing frequency directly if the thickness of MMA is given. These theoretical results have significant effects on the design and analyze of MMA. And lastly, we point out that absorptivity is not absolutely insensitive to the incidence angle in TM mode as what previous study claims, but insensitive when the dielectric slab is high loss, which can also be explained by interference theory

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Section: Extended Interference Theory Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of metamaterial absorber in normal and oblique incidence by using interference theory

et al. 2013

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“…It is a typical single-metamaterial absorber structure, composed of an upper metal pattern layer, intermediate medium layer with thickness d and a bottom metal plane. A similar cross-shaped structure has been developed and applied to many analyses of MMAs [29][30][31], which has certain representativeness, so this structure is used in this paper. The EM wave is radiated to the surface of the MMA slab.…”

Section: Extended Reflection Theorymentioning

confidence: 99%

Investigation of a Metamaterial Absorber by Using Reflection Theory Model

Cheng¹,

Xiong²,

Li³

2017

PIER M

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Abstract-Metamaterial absorber (MMA), as a kind of new-style artificial absorption material, has been extensively researched and discussed. Currently, however, the research focuses mainly on the development and application of the novel structure MMA, and only little work is aimed at the physical mechanism of the MMA. In order to deeply understand the absorption mechanism, in this paper, the numerical simulation results of an MMA are given. Then, based on the reflection theory modal, the numerical simulation results are well discussed and explained in detail. It is found that the theoretical results agree well with that of the simulation, which suggests that the reflection theory modal is effective for analyzing the absorption mechanism of the MMA. The main contributions of this paper are to quantitatively discuss and explain the absorption mechanism of the MMA by using the reflection theory and thus offer a consultation in design and fabrication of the advanced MMA for engineers.

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“…The power dissipated in the proposed electromagnetic metamaterial absorber can be achieved under three conditions: dielectric energy loss, magnetic energy loss from the substrate, and ohmic energy loss from the metal [107], [117], [118]. The absorption is from dielectric energy losses occurred while the nonmagnetic materials like FR4 are used as the substrate.…”

Section: The Incident Energy and Power Dissipationmentioning

confidence: 99%

“…However, they did not investigate the physical and dielectric properties of their device. Huang et al [107], Alves et al [108], and Landy et al [62] presented a single band device with high absorption, with a polarization insensitivity study that includes design, fabrication, and measurements. There is still a lack of investigation in the dual-band or multi-band metamaterial absorbers.…”

Section: Overviewmentioning

confidence: 99%

Synthesis and Analysis of Metamaterial Structure for Microwave Frequency Applications

Uddin¹

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produce uncertainty, therefore, most of the conventional extraction technique rely on relatively thin materials. In the thick materials, the ambiguity appears in different frequency points in several branches which produces phase error. Thus, it is essential to check the proper branch that minimizes the ambiguity and this remains under explored. This doctoral research aims to fill this gap in the scholarly literature by developing a unique extraction technique that will support reducing the ambiguity error and is able to provide accurate values for electromagnetic properties. To achieve this aim, the initial research concentrated on the Nicholsonross-weir (NRW) technique. The modified NRW technique is then applied to a long-length Drude material with known parameters for validation. Another extraction technique known as Kramers-Kronig (KK) technique is also investigated. This KK extraction technique is applied to the use of Cauchy residue integrals instead of using trapezoidal rule integration. Further investigations involved experimentation by using the proposed NRW extraction technique to provide empirical evidence, such as designing a periodic dual-star split ring Synthesis and analysis of metamaterial structure for microwave frequency applications iii resonator (DSSRR) and microwave absorber. DSSRR is an electromagnetic band gap (EBG) based metamaterial structure. The proposed DSSRR structure may be implemented with an equivalent transmission line structure. The advantage of the transmission line structure is that it realizes the artificial structure with minimum losses and produce wide bandwidth. The DSSRR structure is implemented on single unit cells and multiple unit cells. The proposed DSSRR structure delivers a wide-band performance from 7.5 GHz to 9.5 GHz and a maximum rejection up to 47 dB, which offer a sharp cut-off in the reject band. The dispersion diagram exhibits unusual characteristics in both balanced and unbalanced conditions. A microwave absorber was also developed. The proposed design offers three unique shapes without using any additional resistive sheets on top of the ground plane.The three unique shapes are octagonal ring, (OR), cross-wires (CWs), and cut-off circle (CC). The proposed shapes are insensitive to polarization angle, and can achieve perfect absorption. Further work involves the successful extraction of electromagnetic properties using the NRW technique. The numerical and experimental results agree with each other, which further confirms the metamaterial behaviour.iv Synthesis and analysis of metamaterial structure for microwave frequency applications

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Impact of resonator geometry and its coupling with ground plane on ultrathin metamaterial perfect absorbers

Cited by 183 publications

References 22 publications

Analysis of metamaterial absorber in normal and oblique incidence by using interference theory

Analysis of metamaterial absorber in normal and oblique incidence by using interference theory

Investigation of a Metamaterial Absorber by Using Reflection Theory Model

Synthesis and Analysis of Metamaterial Structure for Microwave Frequency Applications

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