Broadband metamaterial for optical transparency and microwave absorption

Zhang, Cheng; Cheng, Qiang; Yang, Jin; Zhao, Jie; Cui, Tie Jun

doi:10.1063/1.4979543

Cited by 260 publications

(150 citation statements)

References 20 publications

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“…With the surface resistance of the ITO film increasing from 40 to 70 Ω per sq, the absorption at the lower frequency band of 7.2-12 GHz is gradually enhanced and the nearperfect absorption performance at higher frequency band of 12-18 GHz is kept. [36] The influence of the PVC thickness on the microwave absorption performance is discussed in Figure 4b. Generally, the value of Q factor of the microwave absorber determines the bandwidth.…”

Section: Doi: 101002/admt201900063mentioning

confidence: 99%

Flexible and Transparent Microwave–Infrared Bistealth Structure

Zhang

Huang

et al. 2019

Adv Materials Technologies

101

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develop compatible stealth materials in both spectrums. The traditional method to achieve radar and IR bistealth is mainly to adopt the microwave absorbers coated by the metallic particles with high reflectivity in IR frequencies. [10][11][12][13] Although low IR emissivity can be realized by optimizing the parameters of metallic particles, the microwave absorption performance would be significantly deteriorated because of the impedance mismatch with the free space.During the last decade, increasing attentions have been paid to metamaterial due to its unprecedented performances in manipulating electromagnetic (EM) waves. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Many intriguing devices based on metamaterial have been proposed in the stealth field, such as perfect absorber, [17][18][19][20] invisible cloak, [21][22][23][24][25] and low-scattering material. [26][27][28] Compared with traditional composite absorbers, metamaterial structures possess more freedoms for the realization of multispectral stealth. Recently, several metamaterial structures have been proposed to achieve multiple-spectral stealth performances. [29][30][31][32][33] In ref.[30], a dual-layer metasurface was adopted to realize microwave-IR bistealth performance, which can absorb the radar wave between 3 and 8 GHz and simultaneously realize a low IR emission of 0.2. Afterward, microwave transmission window and optical transparency have been integrated in single metamaterial. [31] However, these metamaterial-based stealth structures are typically rigid, which cannot be used for the applications on nonplanar surface. In ref.[34], a flexible microwave absorber with optical transparency has been proposed by employing indium tin oxide (ITO) film and polyvinyl chloride (PET) substrate, but the IR stealth property is disabled. As far as we know, there is no relevant report about the flexible and transparent microwave-IR bistealth materials.In this work, we propose a transparent and flexible microwave-IR bistealth metamaterial structure to avoid multispectral composite detection. Measured results prove that our structure exhibits high absorption larger than 90% from 7.7 to 18 GHz within a wide incident angle of ± 40°. Furthermore, a 10 dB radar cross section (RCS) reduction in 7.5-18 GHz is achieved when a metallic column is covered by our bistealth structure. In the IR atmosphere window, a low emission of 0.23 is obtained. In addition, the proposed metamaterial structure possesses excellent flexibility and optical transparency by utilizing ITO films and PVC substrates.A flexible and transparent microwave-infrared bistealth structure is proposed to avoid composite detection in the microwave and infrared bands. By combining intrinsic material properties with proper design, the proposed flexible metamaterial can simultaneously achieve high absorption in the microwave band, low emission the in infrared band, and optical transparency. The structure exhibits wide-angle (40°), broadband (7.7-18 GHz), and high-efficiency (>90%) absorption. Fu...

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Section: Doi: 101002/admt201900063mentioning

confidence: 99%

Flexible and Transparent Microwave–Infrared Bistealth Structure

Zhang

Huang

et al. 2019

Adv Materials Technologies

101

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“…Indium‐tin‐oxide (ITO) films represent great infrared reflectors and are transparent at visible wavelengths. They have also been used as resistive films in metamaterials due to the commercial availability, low cost, and good mechanical flexibility . However, ITO‐based MAs have been intensively studied at microwave frequencies, whereas their applications in THz frequencies have not been properly studied.…”

Section: Introductionmentioning

confidence: 99%

“…However, ITO‐based MAs have been intensively studied at microwave frequencies, whereas their applications in THz frequencies have not been properly studied. Moreover, most of the reported ITO‐based MAs are wideband absorbers, whereas some of the transparent applications, for example, EM shielding glasses for a certain frequency, require single‐ or multi‐band absorbers.…”

Section: Introductionmentioning

confidence: 99%

“…They have also been used as resistive films in metamaterials due to the commercial availability, low cost, and good mechanical flexibility. [24][25][26][27][28] However, ITO-based MAs have been intensively studied at microwave frequencies, 25,26 whereas their applications in THz frequencies have not been properly studied. Moreover, most of the reported ITO-based MAs are wideband absorbers, 27,28 whereas some of the transparent applications, for example, EM shielding glasses for a certain frequency, require single-or multiband absorbers.…”

Section: Introductionmentioning

confidence: 99%

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Optically transparent and single-band metamaterial absorber based on indium-tin-oxide

Yin

Gao

et al. 2018

Int J RF Microw Comput Aided Eng

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This article proposes and experimentally demonstrates an optically transparent and polarization‐insensitive metamaterial absorber in the terahertz (THz) frequencies. The absorber is formed by indium‐tin‐oxide (ITO) resistive films, providing efficient absorption with absorptivity of 94.1% at the peak absorption frequency of 120.8 GHz. We systematically investigate the surface current distribution and the power loss analysis, and explain the architecture of the absorber. Moreover, the absorber exhibits unique absorption properties at resonant frequencies, that is, featuring single‐band or dual‐band operation by changing the surface resistance of the ITO patterns. In addition, the experimental demonstration and measurement results are in good agreement with the simulated results. Most importantly, the fabricated absorber exhibits an optical transparency above 70% over the entire visible waveband, thereby enabling a wide range of applications such as optically transparent THz absorbers and detectors.

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“…And the several absorption peaks with low Q factor finally overlapped together contributing highly effective and broadband absorption. Meanwhile, the materials with strong ohmic loss, such as resistive patch, can also be introduced here to construct broadband MA in electromagnetic wave [23][24][25][26][27][28][29]. Compared with the aforementioned MA based on metal-dielectric-metal configuration, resistive MAs were easy to achieve highly effective and broadband absorption as well as other advantages, such as light-weight, low cost, and easy fabrication.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Resistive Metamaterial Absorber Loaded with Metallic Resonators for the Enhancement of Lower-Frequency Absorption

Shen

Zhang

Pang

et al. 2017

Preprint

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Abstract:Resistive patch array incorporating with metallic backplane provided an effective way to the achievement of broadband metamaterial absorbers(MAs). When loading metallic metamaterial to resistive MA, the outstanding construction helps realize more flexible and diversified forms of broadband absorption. In this paper, we attempted to load metallic resonators(MRs) to resistive MA in the three-dimensional construction, which benefits further enhancement of lower-frequency absorption. Simulation showed that the partial absorption band was separated to lower frequency, while the rest of broadband absorption was unaffected. Meanwhile, after combining multi-unit of the proposed MAs, the stair-stepping broadband absorption was also achieved. At last, three samples were fabricated. The agreements between simulations and experimental results demonstrated that resistive MA loaded with MRs provided an effective way for further enhancement of lower-frequency absorption with almost no change of the absorbing structure and areal density. Thus, it is worthy to expect a wide range of applications to emerge inspired from the proposed attempt.

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Broadband metamaterial for optical transparency and microwave absorption

Cited by 260 publications

References 20 publications

Flexible and Transparent Microwave–Infrared Bistealth Structure

Flexible and Transparent Microwave–Infrared Bistealth Structure

Optically transparent and single-band metamaterial absorber based on indium-tin-oxide

Three-Dimensional Resistive Metamaterial Absorber Loaded with Metallic Resonators for the Enhancement of Lower-Frequency Absorption

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